把..关小点 英语怎么说

三对点选择三个对面则有6种不同选择，
对于每一种选择，使对面的数字互换则可有如下几种：
①一组对面的数字互换，此时有三种选择；
②两组对面的数字互换，此时有三种选择；
③三组对面的数字互换，此时有一种选择；
综上可得不同的刻点种数有：6+6×（3+3+1）=48种．
故选B．

刺绣很精致,也非常好看.精湛的花纹中有看不出任何的瑕疵,如果仔细观察的话,会发现不论是绣动物或花朵,都会栩栩如生.

有
至少避免线路的交叉

1、你酷爱什么?（be crazy about)
What are you crazy about?
2、我不在乎年轻人认为我怎么样.（think of）
I don't care how the youger people think of me.
3、您住的地方离公共汽车站有多远?（live）
How far do you live from the bus station?
4、把音乐关小点您介意么?（turn down）
Do you mind turning down the radio?
5、这棵树一定属于我们.（belong to）
The tree must belong to us.

第一句不可以这样翻译
要翻译成:Can you turn down the TV when you watch it at night?
第二句这样:I will feel gald if you childen don't play ball at home

小点是什么颜色的?如果是黑色,应该是混入了杂质,或者加工温度过高造成聚合物裂解,或者机器清洗不彻底,以前残留的杂质.
如果是白色,可能是加工温度过低,原料没有熔透,也可能是混入白色杂质

因为f(x)=1/2x^2+4inx所以x大于0 f'(x)=x+4/x 根据双钩函数的性质 可知在（2,2+4in2）为极小点 或 对 f'(x)=x+4/x求导得g'(x)=1-4/x^2 当g'(x)=0 得x=2或-2 因为x大于0所以x=2为极小点 则（2,2+4in2）为极小点

1、注意一下底图,一般字体模糊重影的现象,是底图和晒图纸接触不紧密,曝光时投影造成的.如果底图是平整没有折皱的,应该就是玻璃滚筒上的传送带太松,调整紧些试试看.2、小点的问题,如1楼回答所言,可能是玻璃滚筒上有污...

网师园是苏州园林中极具艺术特色和文化价值的中型古典山水宅园代表作品.网师园始建于公元1174年（宋淳熙初年）,始称“渔隐”,几经沧桑变更,至公元1765年（清乾隆三十年）前后,定名为“网师园”,并形成现状布局.几易其主,园主多为文人雅士,且各有诗文碑刻遗于园内,历经修葺整理,最终形成了这一古典园林中的精品杰作.网师园为典型的宅园合一的私家园林.住宅部分共三进,自大门至轿厅、万卷堂、撷秀楼,沿中轴线依次展开,主厅“万卷堂”屋宇高敞,装饰雅致.网师园是全国重点文物保护单位、世界文化遗产.
交通路线：204路,511路,47路,501路,202路,931路等

.我们还有很长的路要走！We still have a long way to go!请小点声说话 ！Please speak in a low voice!这是我经历的最有趣的旅行!This is the most exciting travel I've ever had!

现在我手头没书,你把前面一点内容照给我看,我确定当初学是明白的

有多种可能
极大的可能性是位于平流层的飞机,因为阳光的反射使它看起来发光
还有可能是飞鸟,原理与反射阳光一样.

小学五年级奥数练习题
1.一个植树小组,如果每人栽5棵树,还剩14棵,每人栽7棵树,就缺4棵,问一共有几个人?一共有多少棵树? (10分)
2.王师傅加工零件,如果每天做50个零件,就比计划晚8天完成,如果每天做60个,就可以提前5天完成,这批零件计划几天完成?计划一共做多少个零件? (10分)
3.有2009盏彩灯,按3红.4黄1绿.2蓝灯的顺序排列最后一个是什么颜色的?红灯和黄灯各有多少盏? (10分
4.2006年1月7日是星期六,那么2006年7月1日是星期几? 10月9日星期几? (8分)
5.定义新运算.规定：a #b=a+2b,求5#6 和 12#1的值. (8分)
6、规定:a@=aⅹ(a+1),求1@ 和 1@@的值. (4分)
7、小明跟妈妈一共30岁,妈妈的年龄是小明的4倍,妈妈、小明各多少岁?(4分)
8、爸爸比儿子大28岁,爸爸的年龄是儿子的5倍,爸爸、儿子各多少岁?(8分)
9、安安和爸爸2年前一共36岁,今年爸爸的年龄是安安的4倍,安安和爸爸今年各多少岁?(8分)
10.巧算. (每题5分,共40分) 4.75-9.63+(8.25-1.37) 989-271+11-529 1989×1999-1988×2000 1234+2341+3412+4123 199.9×19.98-199.8×19.97 81.5×15.8+81.5×51.8+67.6×18.5 1+2-3+4+5-6+… …+97+98-99 5÷(7÷11) ÷(11÷16)÷(16÷35)
11.四个数的平均数是90,把其中一个数改成87后,这四个数的平均数是88,这个改动的数原来是多少? (8分)
12.有六个数排成一列,它们的平均数是27,前四个数的平均数是24,后三个数的平均数是33,求第四个数? (8分)
13.一次数学测验,全班的平均分是91.2分,已知男生有24人,平均每人90.5分,女生平均每人92分,求这个班的女生有多少人? (8分)
14.一条120米的公路两旁,每隔6米种一棵杨树,每2棵杨树中间种2盆小花,一共可以种多少棵杨树?多少盆小花? (8分)
15.一个圆形花圃,每隔4米放一盆月季花,共放了24盆,现在要改成每6米放一盆,有几盆花不必移动? (8分)
答案：1、9人 59棵树 2、70天 3900个 3、黄 都是603个4、星期六 星期一 5、17 14 6、2 67、6岁 24岁 8、35岁 7岁 9、8岁 32岁10、2 200 11 11110 3.996 6760 198 2511、95 12、33 13、21人14、21棵 40盆 15、8盆
小学五年级奥数试题
1、用简便方法计算（48×75×81 ）÷（24×25×27）
2、xy,zw分别表示一个两位数,若xy+zw=139,那么x+y+z+w=? （推理题）
3、50名同学面向老师站成一行.老师先让大家从左至右按1,2,3,……,49,50依次报数；再让报数是4的倍数的同学向后转,接着又让报数是6的倍数的同学向后转.问：现在面向老师的同学还有多少名?（倍数问题）
4、鸡兔同笼,头共46,足共128,鸡兔各几只?（鸡兔同笼问题）
5. 有4头猪,这4头猪的重量都是整千克数,把这4头猪两两合称体重,共称5次,分别是99、113、125、130、144,其中有两头猪没有一起称过.那么,这两头猪中重量较重那头有多重?6. 有两个人在一家工地做工,由于一个是学徒,一个是技工,所以他们的薪水是不一样的.技工的薪水比学徒的薪水多20美元,但两人的薪水之差是21美元.你觉得他俩的薪水各是多少?
参考答案： 2、因为个位是9,所以个位相加没有进位个位 即:个位数的和Y+W=9,而不会是19,29,39. 所以十位数的和X+Z=13 于是:x+y+z+w=22 3、50÷4取整12,50÷6取整8,但是要注意,报4倍数的同时可能是6的倍数,所以还要算出4和6的公倍数,有50÷12（4和6的最小公倍数）=4（取整）,所以,应该是50-12-8+4=344、[专题介绍]鸡兔同笼问题是指在应用题中给出了鸡和兔子的总头数和总腿数,求鸡和兔子各有多少只的一类问题.鸡兔同笼问题在解答过程中用到假设的思路,可以假设都是兔子,这样总腿数就比实际腿数要多,多出来的腿数就是把鸡当兔子多算的,因此再除以一只鸡比一只兔子少的腿数就可以求得鸡有多少只.也可以假设成都是鸡,这样就可以求得兔有多少只.[分析] ：如果 46只都是兔,一共应有 4×46=184只脚,这和已知的128只脚相比多了184-128=56只脚.如果用一只鸡来置换一只兔,就要减少4-2=2（只）脚.那么,46只兔里应该换进几只鸡才能使56只脚的差数就没有了呢?显然,56÷2=28,只要用28只鸡去置换28只兔就行了.所以,鸡的只数就是28,兔的只数是46-28=18. ①鸡有多少只? （4×6-128）÷（4-2） =（184-128）÷2 =56÷2 =28（只） ②免有多少只? 46-28=18（只） 答：鸡有28只,免有18只.[总结]：先假设它们全是兔.于是根据鸡兔的总只数就可以算出在假设下共有几只脚,把这样得到的脚数与题中给出的脚数相比较,看相差多少.每差2只脚就说明有一只鸡；将所差的脚数除以2,就可以算出共有多少只鸡.我们称这种解题方法为假设法.概括起来,解鸡兔同笼问题的基本关系式是： 鸡数=（每只兔脚数× 兔总数- 实际脚数）÷（每只兔子脚数-每只鸡的脚数） 兔数=鸡兔总数-鸡数 当然,也可以先假设全是鸡.
5. ab+cd=ac+bd=ad+bc(ab指a与b的体重和)明显99+144=113+130=125+x,可以看出,少掉的那个数是：118.不失一般性,ab+ac(cd+bd)=2a2d=62即ad=31或bc=31即某两头猪的体重之差为31,并且这两头猪要么和为118,要么两头猪都不是和为118的那两头猪.而两个数的和与差的奇偶性是相同的,所以可以看出,必定是b与c之外的两头猪的体重之差为31. 得出：a=78,d=47(也有可能a=47,d=78,这无关紧要)而ab=99或144,可以看出两值：78,66,52,47或：78,21,97,47明显第二组是错的,所以,第一组是正确的,答案就是：66 6. 假设技工和学徒的比较标准是以1美元为准的.那么技工的薪水是20美元50美分,学徒的薪水是50美分.与1美元相比,技工的薪水就是正值,学徒的就是负值,二者之差就是21美元,而从实际来讲技工的薪水比学徒的高20美元.

先给你这些用：
初一上册词组与句型
1. be from/come from 2. Nice to meet you.
3. I’m in Class One, Grade Seven. 4. Stand up. 5. Sit down.
6. practice doing 7. I’m not English. I’m Chinese.
8. write on the blackboard 9. family/last name/surname 姓
10. given/first name名 11. play football 12. play the piano
13. ride a horse 14. Please welcome Betty to our school.
15. Lingling’s mother is a doctor at the hospital.
16. The twins’ father is an English teacher in a university in Beijing.
17. Can you speak Arabic/ Russian/ Spanish?
18. In my classroom there is（就近原则）a blackboard and twenty-two desks.
19. Are there any computers on your desks?
20. Is there a computer on Miss Li’s desk?
21. There isn’t a computer on Miss Li’s desk.
22. There aren’t any computers on our desks.
23. next to 24. in front of 25. a science lab 26. a dining hall
27. I haven’t got any brothers 28. She hasn’t got a sister.
29. Have you got a small family or a big family? Yes, I have./No, I haven’t.
30. thank sb. for sth./ doing sth. 31. Have we got any juice? Yes, we’ve got some.
32. Pork is healthy food. 33. Coke is an unhealthy drink.
34. Fruit and vegetables are healthy food. 35. Would you like to do….?
36. in the morning 37. in the afternoon 38. in the evening
39. at night 40. on Monday morning 41. go to the cinema
42. Let’s do… 43. invite sb. to a place 44. on Tuesday
45. The film is on in the evening. 46. ask sb. to do sth. 47. listen to some music
48. this year 49. send an email 50. He sings very well.
51. What day is it today? 52. What are your lessons today?
53. We have chemistry at half past eleven. 54. get up 55. have a break
56. talk to sb. 57. We have meat and rice with vegetables.
58. have dinner 59. do one’s homework 60. go to bed
61. finish doing… 62. get presents 63. have a party
64. send sb. sth./send sth. to sb. 65. make sb. sth./make sth. for sb.
66. what/how about sth./doing sth. 67. give sb. sth./give sth. to sb.
68. watch a basketball game 69. go to a football match
70. That’s a great idea! 71.a pair of trainers./jeans 72. like doing/to do
73. She doesn’t like table tennis or basketball. 74. He watches the football on TV.
75. She buys CDs by her favorite singers. 76. at once
77. In the UK and the USA people often give flowers as birthday presents.
78. choose between两者/from三者/to do 79. show sb. sth./show sth. to sb.
80. Sixteen thousand people visit the zoo every day. 81. There she is.
82. in the desert/jungle 83. The kangaroo lives in grassland and eats leaves.
84. a European wolf 85. in the wild 86. The panda eats 15 kilos of bamboo a day. 87. stay healthy 88. connect sth. to sth.
89. switch on/off 90. write homework on the computer
91. open a new document 92. save/print the document 93. write a name for it
94. go online 95. make travel plans
96. download music from the Internet 97. check the train timetable
98. visit a website at the weekend 99. get information for my lessons on the net
100. use my laptop for work
101. American teenagers use the Internet to do their homework.
初一下册词组与句型
1. wait for sb./sth. 2. be on a school trip
3. talk to 4. have a good time 5. take pictures
6. lie in the sun 7. enjoy doing
8. listen to sb./sth. 9. by car/ in a car
10. run buses 11. have a drink 12. watch a ballet
13.get dressed 14. write to sb.
15. the Forbidden City 16. talk on the cell phone
17. be at work 18. sweep away bad luck
19. decorate the windows with paper cuts 20. at midnight
21. all the year round 22. at the Lantern Festival
23. on Spring Festival’s Eve 24. be interested in 25. tell sb. about sth 26. at the weekend 27. on Saturday morning 28. check emails
29. at a friend’s home 30. Would you like to come?
31. stay in bed 32. revise for the test 33. go sightseeing
34. look forward to doing. 35. make friends with sb. 36.make plans to do 37.There will be a concert on Saturday evening. 38. in the future
39. at the North Pole 40. heavy rain 41. strong wind
42. three days a week 43. on the Internet 44. get warm
45. Flying in planes will be cheap. 46.care for children 47. East China
48. What’s the population of Beijing? 49. in/on/to the west of 50. be famous for
51. on the River Thames 52. Cycling is more relaxing than running.
53. leave for 54. It’s difficult for me to see at the back.
55. need to do 56. No one wants to write carelessly.
57. take sb. around Beijing 58. sit at the table 59.in the shape of
60. fill sth. with sth. 61. buy sb. sth./ buy sth. for sb.
62. He lives farthest from school. 63. be close to 64. millions of
65. It takes/took/will take/has taken sb. some time to do
66. one of the busiest international airlines 67. be well-behaved
68.a distance of over 8,000 kilometers 69. be strict with sb./ in sth.
70. What’s he like? 71.on the east coast of China
72. ask sb. about sth. 73. once upon a time 74. decide to do
75. pick some flowers 76. be lost 77. pick up
78. notice sb. do/doing 79. go for a ride 80. rush out of
81. be asleep 82. be in pieces 83. point at
84. fairy tales 85. again and again 86. change into
87. begin with 88. Teachers’ Day 89. on the beach
90. at the age of 91. move to 92. start to do/doing
93. in English 94. in the world 95. be good at
96. What do you think of the film? 97. on TV 98. the next day
99. the 38-year-old astronaut 100. go on holiday 101. at the airport
102. How long does it take to get there? 103. say hello to sb.
104. spend some time/money on sth./(in) doing 105. at first
106. hurry up/ away/ to some place
初二上册词组与句型
1. try not to translate every word 2. give sb. some advice 3. next to
4. Why don’t you write it down? 5. in class 在课上 6. Thanks a lot.
7. It’s a good idea to do… 8. How about listening to the radio?
9. do some concerts 10. help sb. do/to do/with sth.
11. make a mistake 12. What do you think of the film?
13.Many students ask me for advice about improving their English.
14. enjoy oneself 15.take a deep breath
16. a piece of paper 17. every day 18. advise sb. to do
19. The best way to learn vocabulary is to remember eight or ten words a day.
20. find it adj. to do 21. the number of sth. 22. get good marks
23. make sb. adj./do sth. 24. practice/practice speaking English
25. Remember to speak English all the time. 26. invite sb. to some place/to do
27. improve your English by listening to the radio 28. Don’t forget to do…
29. enter a competition 30. Has she visited China before?
31. today’s newspaper 32. What do you reckon?
33. It sounds brilliant. 34. take off from Beijing Airport and land in London
35. go to sleep 36. dream about 37.on TV 38. in newspaper
39. What is the price of a plane ticket to the USA? 40. all over China
41. I’ve never been to Shanghai. 42.There is a lot to see and do there.
43. I don’t like sandwiches or ice cream. 44. sell out 45. give a concert
46.at the end of… 47. in the end 48. in a seat 49. come true
50.take a photo of… 51. a theme park 52. What are you up to?
53. Don’t panic. 54. the latest news 55. That’s why it’s on the news.
56. I’ve heard they’ve gone to Shanghai on business. 57.How do you feel about…?
58. No one has been to the moon recently. 59.Has it reached Mars yet?
60. make a list of… 61. There has been life on the earth.
62. None of them has an environment with air. 63.solar system
64. in the universe 65. Is there life out there in space?
66. How long does it take to reach Guangzhou? 67. So far they’ve planted 4 trees.
68.I haven’t seen anything as good as that one for a long time.
69. It’s so good that I’ve asked the library to keep the next book for me.
70. hope to do/ that从句 71.arrive in/at 72. get on well with.
73. hear about/ of听说 74. in fact 75. drop out of school
76. look after 77. They can go to school with the help of Project Hope.
78. In the last 15 years, this project has raised money and paid for the education of many poor students. 79. thousands of 80. finish doing
81. stop doing/to do 82. because of 83. teach sb. to do…
84. learn to do… 85. tell sb. about 86. Who is it by?
87. I’m a fan of… 88.Give us a break!
89. dance to the music 90. The river goes through the city.
91. Vienna is the capital city of Austria. 92.beautiful pieces of music
93. play all types of music 94. a part-time job 95. hit records
96. more than any other artist 97. one of the most important figures
98. mind doing 99. belong to 100. start to do/doing
101. The composer makes sure that everybody plays together.
102. How is it going? 103. go on doing/to do 104. run past sb. 105. smile at
106. let sb. do 107. Every boy and girl in Britain has read it.
108. tell the time 109. do sth. by mistake 110. get tired 111. by the river
112. have nothing to do 113. Once or twice she looked into her sister’s book.
114. think of making a daisy chain 115. A white rabbit with red eyes ran by her.
116. hear sb. do/doing 117. take a watch out of its pocket 118. run across the field
119. ask sb. to do 120. have a picnic 121. grow up 122. tell a story
123. There was a good program on. 124. Suddenly all the lights in my room went off.
125. There is sth. wrong with… 126. lie in bed 127. play with a ball
128. during the day 129. on my way to school 130. outside a bookshop
131. look up new words in a dictionary 132. These shoes feel tight. 133. Have a try.
133. The milk smells sour. 134. The fish soup tastes salty. 135. have a look
136. introduce sb. to sb. 136. go to the airport to meet sb. 137. I’m afraid that…
138. Who looks smart? 139. get sth. ready 140.thank sb. for…/thanks for…
141.hear from sb. 142. sound great fun 143. can’t wait to do
144. tell sb. about sth./to do 145. I enjoy sports as well. 146. work hard at
147. He is captain of the school tennis team. 148. be proud of/take pride in
149. be afraid of sth./doing 150. get/be angry with sb. 151. over there
152. I’m very excited about coming to China. 153. on the left/right
154. the Great Hall of the People 155. How do I get to Tian’an men Square?
156. go straight ahead 157. Can you tell me the way to a park?
158. It’s kind of quiet. 159. Go across the square and turn left into Chang’an Jie.
160. in the middle of 161. go along 162. The best way to see London is by boat.
163. get on/off the boat 164. You are now back where you started.
165. on the other side of the river 166. walk across the river over Trinity Bridge
167. It can walk a long way without drinking. 168. It’s sad to think about animals in danger. 169. Many animals have no place to live in. 170. live in peace
171. decide not to think about it. 172. Let’s find out what we can do to save them.
173. too dirty to drink 174. be surprised to do 175. live on bamboo
176. There are about 1000 pandas living in nature reserves. 177. for many reasons
178. Pandas have less and less land to live on. 179.the symbol of象征/for标志
180. one of the best-known animals in the world. 181. enough places to live in
182. endangered animals 183. provide sth. for sb./ provide sb. with sth.
184. The difficulty is to keep the Earth clean. 185. There may be few whales left.
186. in the wild 187. Beijing Opera 188. offer sb. sth./ sth. to sb.
189. As you know, Sally’s main interest is music. 190. agree with sb. / to sth. /to do sth./几方on sth. 191. Would you like us to take you to Lao She’s teahouse?
192. try to do尽力 try doing 尝试 193. find the opera easy to understand
194. take place 195. continue to do/doing 196. Anti-Japanese War
197. teach Chinese to the English in London 198. one of the greatest writers of the 20th Century 199. bring sb. sth./sth. to sb. 200. bring the customers tea/ the tea to the customers 201. folk music 202. give a warm welcome to everyone from China 203. The best part of the film is the singing. 204. We didn’t want the play to end. 205. The audience sat on stone seats. 206. It’s freezing.
207. Will it be snowy? 207. You must be joking! 208. at the moment
209. We’re off to Hong Kong. 210. Better get going. 211. sth. warm to wear
212. choose between … and/from/to do 213. In winter there is a lot of snow.
214. The best plan is to arrive in New York in September. 215. It’s a good idea to do…. 216. take a photo of… 217.in the northwest 218.remember to do要去做 /doing已经做 219. from time to time有时 220. compare to/with
221. depend on 222. stop doing停止做stop to do 停下来去做 223. Get a move on.
224. Hang on! 225. accept a present 226. wrap sth. in red paper
227. You mustn’t do anything on the first day of the Chinese New Year.
228. You can’t be serious. 229. It’s a tradition in China to give presents at Spring Festival. 230. Tea is not just a drink but a light meal. 231. at a tea party
232. in buses or trains 233. hear people shouting in the street 234. arrive at the church on time 235. throw the flowers over the shoulder 236. get married结婚动作/marry sb. 嫁/娶/be married结婚状态 237. can’t wait to unwrap the presents
238. It’s cool to wear the cap back-to-front. 239. on the pavement
240. a pair of trousers 241. be asleep睡着了fall asleep入睡 242. in 10 years’ time
243. make money from animal skins 244. Put the fire on! 生火
245. It’s dangerous for ships to keeping going in heavy storms.
246. The villagers are waiting for a rain to come so that the rice will grow.
247. It takes time to make friends in the US.
248. They are shy about their age. 249. They are not young any more/ longer.
250. This is also being polite and friendly-it’s not a real invitation.
251. Wait a little bit. The waiter will bring us cakes to eat. bring sb. sth./ sth. to sb.

天平每个托盘放3颗,若平衡,则用天平把剩下的两个中,小的挑出来;
若不平衡,则轻的一侧有小的.把轻的里面的三个之中的两个放到天平两侧,若平衡,则剩下的就是小的;若不平衡,则轻的就是小的.

作文题目中可以出现除句号外的很多符号,你所说的间隔号是其中之一,常用与表示并列,与顿号相似.

一点一横一大撇,两个横折四小点,左一撇右一撇,一撇一撇又一撇.猜一个字?答案：廖

Raise your voice a little please.I can't hear you.
Lower your voice in case you disturb other people.
I thought it wouldn't be snowing,but it is now snowing.
After snow,the roads are treturous.We'd better not ride the bike.We should take the bus.
Please sing it louder/lower.

初中物理中追击和相遇问题分析时基本可以考虑：（1）相对速度：同向时v=v大-v小,
异向时v=v1+v2
(2)相对的路程：即为某时刻两者相距的距离

A

第一个问题：假的,别人瞎编的.
第二个问题：使用之后之后会慢慢稳定的.

听描述可能是蛞蝓。

就是要长度的意思

A-2=0且a+2b=0
a=2 b=-1
1-a=0
a=1
b+3=0
b=-3
a+b=-2

（1）就是题目本身的排列
（2）-3x（y）3+2(x)2(y)2 +(y)2+(y)2-(y)4
按其中一个字母升降幂排列,将另一个视为常数即可.

0.9循环不能化成分数
是比
1小

你好,如果外皮尺寸是33*33,建议购买稍微大一点的芯,这样装起来四个角可以撑起来,效果比较饱满好看.如果买一般大的芯,装起来会显得四角空.
建议买裁料38*38厘米的,缝制后36*36厘米的芯,这样才合适,肯定能装的进呀.只要你的拉链长度不是非常短.
装的时候应该将整个芯用手握住中间,先装一半,然后扯住下面两个角抻开,防止芯的角折在里面,然后将后半截装入.记得拉链要扯直了,成放松状态才能拉,不能勉强.
说一下,我是文登市丹晨家纺厂的,我们厂每年做20万个靠垫芯呢

应该是表示两个音节吧,例如字典上这个单词会是这样写front•age

小山雪景

温度计液泡首先受热膨胀,所以液柱先下降.
之后水银受热膨胀,液柱上升

在设A点坐标之前应该在演算纸上做一些工作：
准备知识：与直线Ax+By+C=0垂直的直线可设为Bx-Ay+C'=0；（二直线垂直x、y的对应系数之积的和等于0）
因为直线OA垂直直线C1,所以可设直线OA的方程为：xcosα+ysinα+C=0,因为点O(0,0)在直线OA上,代入可得C=0；
直线C1：xsinα－ycosα－sinα＝0.
直线OA：xcosα+ysinα=0；
二方程联立便可求得A(sin²α,－cosαsinα).
祝考试顺利!

[关键词]跨文化交际 汉英文化差异 褒奖语及应答 语用失误 一、引言 语言是英语文化中,人们习惯把对对方的敬佩和感激用不同的言语行为表现出来,假使要

旳 拼音:dì

分析：这句话运用了细节描写,生动形象的描绘出了贝壳的外表.（还可以考虑位置结构,看看有没有前后照应神马的~）
仿写：种子很小,却非常的顽强和富有生机.褐色的外壳下隐藏着小小的生命.如果仔细观察,在种子身上还有一条一条排列整齐的凹纹.

2^1.5=2^(3/2)=根号下（2^3）=根号8=2*根号2约=2*1.4142约=2.8284

Q是有理数

是的 因为pm2.5的粒子相对来说重量比较重 遇到水就会更重 容易落到地面上

你的理解有问题,原核生物中只有核糖体一种细胞器,小点指的就是细胞质基质体

一方面采用易燃的木材做成小棒(称火柴梗),在其一端蘸以蜡油和含氯酸钾的药料(称火柴头)火柴头上主要含有氯酸钾、二氧化锰、硫磺和玻璃粉等.火柴杆上涂有少量的石蜡.火柴盒两边的摩擦层是由红磷和玻璃粉调和而成的.火...

是的,等位基因位于同源染色体上；④ 一条染色单体复制后就组成一条染色体,也就是说一条染色体有两条染色单体组成,其中一条是通过另一条复制得来的,他们有相同的基因,所以说染色单体分开就是相同基因分离.

石头不用买～砖块～比重大的金属除了金就算是数铅了

你看到的一个一个小点叫做激光散斑.当粗糙表面受到相干光源（如激光）的照射就会发生这种现象.激光在粗糙表面发生漫反射,各个反射光相互干涉,就形成了明暗交替的光斑.
参见下面的网页.

廖字 不知道你是不是这样想的

möchte 是 mögen 的第二虚拟式~表示委婉语气的~因此常常用möchte作为自己要求的提出,表示客气~
mochte 是 mögen 的过去式,楼主请看仔细~不会是字典问题
mag 才是一般现在时~
这是情态动词~楼主请再仔细看看语法书哦~

首先我们要知道鸡蛋就是卵细胞,其中真正的卵细胞是蛋黄,蛋清只是为孵化过程提供的营养物.这也正是蛋白质(一类营养物)名称的来源.因此,我们说小鸡都是受过精的鸡蛋里的蛋黄(卵)变成的,...另外,在解剖母鸡时,你可以看到各种大小的蛋黄.这些就是尚未发育完全的卵细胞.鸡蛋的外壳是石灰质的硬壳,叫卵壳.卵壳起保护作用.卵壳上约有7000多个小孔,可通气,紧贴卵壳有两层卵膜,外层较厚.在鸡蛋的钝端内(大头）,两层膜之间常分开形成一个小气室,贮存空气,供胚胎发育时的呼吸.(这就是煮熟的鸡蛋里空的部分).卵膜内是大量的卵白（蛋清）,其成分有水、蛋白质、少量的糖类和无机盐；外层较稀,可叫稀蛋白,内层稠,叫浓蛋白.这些物质是供鸡胚胎发育时的营养物质.再往里是一个圆球形的卵黄（蛋黄）,这才是卵细胞.卵黄表面有一层很薄的膜,叫卵黄膜,即是细胞膜.卵黄一般分层,由黄卵黄与白卵黄以同心圆形成相间排列组成,中间有卵黄心,以卵黄心颈与胚盘相连,沿鸡蛋长轴,卵黄的两端由浓稠的蛋白质组成卵黄系带,它使卵细胞维持在蛋白中心,起着缓冲作用,防止卵的震荡,有利于卵的孵化.卵黄上有一个白色的小圆盘（就是在蛋黄上看到的小白点）,这是由细胞核与一部分细胞质组成,这就是胚盘.如果是受精卵,胚盘在适宜的条件下就能孵化出雏鸡.
因此,说鸡蛋是一个细胞是不准确的,但说鸡蛋里只有一个细胞是正确的,那就是蛋黄,如果是没有受精的,它就是一个卵细胞,如果是受精的,它就是一个受精卵细胞.这只是就刚生下的鸡蛋而言,如果鸡蛋开始孵化,受精卵细胞要进行细胞分裂,那就不只有一个细胞了.
C

10万像素.数字越大,解析度越高.
“像素”（Pixel） 是由 Picture(图像) 和 Element(元素)这两个单词的字母所组成的,是用来计算数码影像的一种单位,如同摄影的相片一样,数码影像也具有连续性的浓淡阶调,我们若把影像放大数倍,会发现这些连续色调其实是由许多色彩相近的小方点所组成,这些小方点就是构成影像的最小单位“像素”（Pixel）.这种最小的图形的单元能在屏幕上显示通常是单个的染色点.越高位的像素,其拥有的色板也就越丰富,越能表达颜色的真实感.

不可以,这表示一种不满,并希望对方改正,所以要强调语气,用"!"更好

算出角度光线从中心点出来在面上全反射时的角度,并确定由这一角度出来的光线在面上的交点,此交点与面中心的距离为半径,中心为圆点做圆,这部分就是要遮住的部分