高二英语单项1 he wanted to play football in the street ,but his mo

The new year is coming!Now,it's the time to make plans for the new year.Here is what I will do:1.I will get better grades.I'm good at English and Chinese,but I need to improve in my Math.I'll study be...

答案错了吧.没道理用不定式的,主动关系就用现在分词就得了.

　　早上五点五十起床
　　5:50——6:10 20分钟洗漱
　　6:10——6:35 25分钟做瑜伽拉伸筋骨
　　6:35——6:40 背诵10个英语单词，积少成多
　　6:40——6:50 背诵文科的知识点（我是理科）
　　6:50出发上学
　　下午10:00放学到家
　　10:10开始写作业
　　写完之后做学习资料，直到11:00睡觉。
　　亲身体验，效率很高哦。

这句话可以这样看,把逗号隔开的部分先去掉,It took more than two decades for regular colour TV broadcasts to begin in the USA.也就是,It took 一些时间 for sth.to do sth.这样的话,for 和to 的成分就很明显了...

I just love weekdays（改成weekday） afternoons in May.It is during this special time when（改成that） I get to see one of （加the）most wonderful sights in the world.It is a sight that teach（改成teaches） me again and again about （about去掉）what life is true（改成truely） all about.I get to see it mainly if （改成when）I go to pick up my yongest son to（改成from） school.I can even hear it as I get out of my car.Its musical and magical sounds float happily through the air.They are the happy shouts of children at play.These beautiful and happy children remind me of（of去掉） that life is about joy,laughter and love.We all have to do our jobs,cleaning（改成clean） our houses,raise our families,and take care of all the tasks in life,which may make you ignore the laughter and joy around us in some ways.
如果满意请采纳!

L1：ax－2y－2a＋4=0交y轴于M(0,2－a)；L2：2x＋a²y－2a²－4=0交x轴于点N(a²＋2,0)
且这两条直线的交点是Q(2,2),则四边形的面积S=三角形ONQ的面积＋三角形OMQ的面积=(1/2)[2(2－a)＋2(a²＋2)]=a²－a＋4=[a－(1/2)]²＋(15/4),则当S最小时,S的最小值是15/4,此时a=1/2,则此时L1：x－4y＋6=0,L2：8x＋y－18=0

1.well改为good 2 .puzzling改为puzzled 3. got the pay 4,making改为make 应该没有错吧,呵呵,希望可以帮到你咯.

1用浓盐酸溶解,过滤,分离出SiO2
2加浓氢氧化钠至强碱性,过滤,分离出CuO
3再向上述得到的碱液中通入过量CO2,得沉淀,将沉淀焙烧得Al2O3

1 B这是一个主语从句 2C 3A WHY 引导的从句是修饰 REASON 做的是定语,而THAT引导的句子是解释REASON做的是名词性定语从句,不知你是明白了.
1WHAT 2that 3what 4it 5that 6whoeve

sunjiayi525说的不完全,因为绝缘橡胶制成,所以其中的电荷一旦存在便不会移动.又因为原来均匀带电,所以才有电量比例就是长度比.如果是导体环,一旦AB移开,大环上电荷会向开口出聚集,物理上叫尖端放电.（当然,题是不会这么考的）
在奥赛上,还有一个电荷体密度的概念,知道它这个题理解就简单了.
你的答案有误吧,应是Q'=（Q/2兀R）L.2兀R/L是才长度分数.

1.will not have caused
2.suffered
3.could join
4.so will you
5.appeals me more than sports

4.He was in the lead in the one-hundred meter race yestrday.All of us congratulated him for it.
5.All in all//In a word,he is a fully//all-round developed student.

这是一个公式,类似于完全平方公式
（R+r）^2=R^2+2Rr+r^2
大小r分别代表基因池中显性基因与隐性基因的百分比
然后R^2代表RR的百分比,2rR代表rR的百分比,r^2代表rr的百分比
理解否?

.Besides the stars,the astronaut saw nothing but the space.
2.we must keep on learning so as not to fall behind the times.
3.The fish tastes terrible. It appears to have gone bad.
4.The ce...

dbd

答案：A,C
解释：
第一题：suggest 表示“建议”,但是不可以用suggest sb. to do sth 这一结构,urge 表示“督促,催促”,是正确答案.句意是：我妈妈曾多次督促我不要抽烟了,可是我没有听从她的（劝告）.
第二题：which 引导非限制性定语从句,修饰前面的phone calls.
祝你学习进步,更上一层楼!请记得采纳,谢谢!(*^__^*)

sin(π/2+a)=cosa=-4/5
sin²a+cos²a=1
第二象限则sina>0
所以sina=3/5
所以原式=cosπ/3cosa+sinπ/3sina=(-4+3√3)/10

(2-3*5^-1)+(4-3*5^-2)+(6-3*5^-3)+...+(2n-3*5^-n)
=(2+4+6+...+2n)-3*(5^(-1)+5^(-2)+...+5^(-n))
=n(2+2n)/2-3*((1/5)*(1-(1/5)^n)/(1-(1/5))
=n^2+n-3*(1-5^(-n))/4

常用逻辑用语（1）命题及其关系①了解命题的逆命题、否命题与逆否命题；②理解必要条件、充分条件与充要条件的意义，会分析四种命题的相互关系；（2）简单的逻辑联结词通过数学实例，了解"或"、"且"、"非"逻辑联结词的含义．（3）全称量词与存在量词①通过生活和数学中的丰富实例，理解全称量词与存在量词的意义；②能正确地对含有一个量词的命题进行否定．...

一、电场
1.两种电荷、电荷守恒定律、元电荷：(e＝1.60×10-19C）；带电体电荷量等于元电荷的整数倍
2.库仑定律：F＝kQ1Q2/r2 （在真空中）
｛F:点电荷间的作用力(N),k:静电力常量k＝9.0×109N•m2/C2,Q1、Q2:两点电荷的电量(C),r:两点电荷间的距离(m),方向在它们的连线上,作用力与反作用力,同种电荷互相排斥,异种电荷互相吸引｝
3.电场强度：E＝F/q（定义式、计算式)
｛E:电场强度(N/C),是矢量（电场的叠加原理）,q：检验电荷的电量(C)｝
4.真空点（源）电荷形成的电场E＝kQ/r2 ｛r：源电荷到该位置的距离（m）,Q：源电荷的电量｝
5.匀强电场的场强E＝UAB/d ｛UAB:AB两点间的电压(V),d:AB两点在场强方向的距离(m)｝
6.电场力：F＝qE ｛F:电场力(N),q:受到电场力的电荷的电量(C),E:电场强度(N/C)｝
7.电势与电势差：UAB＝φA-φB,UAB＝WAB/q＝-ΔEAB/q
8.电场力做功：WAB＝qUAB＝Eqd
｛WAB:带电体由A到B时电场力所做的功(J),q:带电量(C),UAB:电场中A、B两点间的电势差(V)(电场力做功与路径无关),E:匀强电场强度,d:两点沿场强方向的距离(m)｝
9.电势能：EA＝qφA ｛EA:带电体在A点的电势能(J),q:电量(C),φA:A点的电势(V)｝
10.电势能的变化ΔEAB＝EB-EA ｛带电体在电场中从A位置到B位置时电势能的差值｝
11.电场力做功与电势能变化ΔEAB＝-WAB＝-qUAB (电势能的增量等于电场力做功的负值)
12.电容C＝Q/U(定义式,计算式) ｛C:电容(F),Q:电量(C),U:电压(两极板电势差)(V)｝
13.平行板电容器的电容C＝εS/4πkd （S:两极板正对面积,d:两极板间的垂直距离,ω：介电常数）
常见电容器
14.带电粒子在电场中的加速(Vo＝0)：W＝ΔEK 或 qU＝mVt2/2,Vt＝(2qU/m)1/2
15.带电粒子沿垂直电场方向以速度Vo进入匀强电场时的偏转(不考虑重力作用的情况下)
类平抛 垂直电场方向:匀速直线运动L＝Vot(在带等量异种电荷的平行极板中：E＝U/d)
运动 平行电场方向:初速度为零的匀加速直线运动d＝at2/2,a＝F/m＝qE/m
注:(1)两个完全相同的带电金属小球接触时,电量分配规律:原带异种电荷的先中和后平分,原带同种电荷的总量平分；
(2)电场线从正电荷出发终止于负电荷,电场线不相交,切线方向为场强方向,电场线密处场强大,顺着电场线电势越来越低,电场线与等势线垂直；
(3)常见电场的电场线分布要求熟记；
(4)电场强度（矢量）与电势（标量）均由电场本身决定,而电场力与电势能还与带电体带的电量多少和电荷正负有关；
(5)处于静电平衡导体是个等势体,表面是个等势面,导体外表面附近的电场线垂直于导体表面,导体内部合场强为零,导体内部没有净电荷,净电荷只分布于导体外表面；
(6)电容单位换算：1F＝106μF＝1012pF；
(7)电子伏(eV)是能量的单位,1eV＝1.60×10-19J；
(8)其它相关内容：静电屏蔽 / 示波管、示波器及其应用 / 等势面.
二、恒定电流
1.电流强度：I＝q/t ｛I:电流强度(A）,q:在时间t内通过导体横载面的电量(C）,t:时间(s）｝
2.欧姆定律：I＝U/R ｛I:导体电流强度(A),U:导体两端电压(V),R:导体阻值(Ω)｝
3.电阻、电阻定律：R＝ρL/S ｛ρ:电阻率(Ω•m),L:导体的长度(m),S:导体横截面积(m2)｝
4.闭合电路欧姆定律：I ＝E /(r+R) 或 E＝Ir + IR 也可以是E ＝U内 + U外
｛I:电路中的总电流(A),E:电源电动势(V),R:外电路电阻(Ω),r:电源内阻(Ω)｝
5.电功与电功率：W＝UIt,P＝UI ｛W:电功(J),U:电压(V),I:电流(A),t:时间(s),P:电功率(W)｝
6.焦耳定律：Q＝I2Rt ｛Q:电热(J),I:通过导体的电流(A),R:导体的电阻值(Ω),t:通电时间(s)｝
7.纯电阻电路中:由于I＝U/R ,W＝Q,因此W＝Q＝UIt＝I2Rt＝U2t/R
8.电源总动率、电源输出功率、电源效率：P总＝IE,P出＝IU,η＝P出/P总
｛I:电路总电流(A),E:电源电动势(V),U:路端电压(V),η：电源效率｝
9.电路的串/并联 串联电路(P、U与R成正比) 并联电路(P、I与R成反比)
电阻关系 R串＝R1+R2+R3+ 1/R并＝1/R1+1/R2+1/R3+
电流关系 I总＝I1＝I2＝I3 I并＝I1+I2+I3+
电压关系 U总＝U1+U2+U3+ U总＝U1＝U2＝U3
功率分配 P总＝P1+P2+P3+ P总＝P1+P2+P3+
10.欧姆表测电阻
(1)电路组成 (2)测量原理
两表笔短接后,调节Ro使电表指针满偏,得
Ig＝E /(r + Rg + Ro)
接入被测电阻Rx后通过电表的电流为
Ix＝E /(r+Rg+Ro+Rx)＝E/(R中+Rx)
由于Ix与Rx对应,因此可指示被测电阻大小
(3)使用方法:机械调零、选择量程、短接欧姆调零、测量读数
｛注意挡位(倍率)｝、拨off挡.
(4)注意:测量电阻时,要与原电路断开,选择量程使指针在中
央附近,每次换挡要重新短接欧姆调零.
11.伏安法测电阻
电流表内接法：电流表外接法：
电压表示数：U＝UR+UA 电流表示数：I＝IR+IV
Rx的测量值＝U/I＝(UA+UR)/IR＝RA+Rx>R真 Rx的测量值＝U/I＝UR/(IR+IV)＝RVRx/(RV+R)>RA [或Rx>(RARV)1/2] 选用电路条件Rx

It is a great honour for me to introduce to you my cousin Li Hua,a 21-year-old graduate of Shanghai Institute this year.

1.Quantity without quality should also be regarded as cheating consumers.不求质量而一位的追求数量也应该被看作是对消费者的欺骗.
2.Blue skies are not always a guarantee of fine weather.蔚蓝的天空并不总能保证有好天气.
3.Professor Smith planned to have his book printed and tried to connect with local publishers.史密斯教授打算把他的书出版了,他正在联系本地一个出版商.

事情已经做完了,所以用完成时.
any other 是和man连在一起的,表示其他人,otherwise是否则……

选B、D吧.
因为b极附近溶液呈蓝色,所以说明碘离子在b极被氧化,那b就是阳极,与阳极相连的应该是电池的正极,或者说电子都是流回正极的,所以y是正极,也就是这一步判断用到了电子守恒
那下一步就是要用离子守恒,正离子去一边另一边负离子自然就多了,就想上厕所,男生肯定去男的多的厕所吧.嗯嗯,扯远了.碘离子到b极,那氢离子钾离子就到a极,所以反应就是氢离子得电子变成氢气那与a相连的铂电极就是要失电子了,所以就是氢氧根失电子产生氧气,所以说碳电极就是发生的得电子的还原反应,x是负极,与一开始的判断一致~
至于氢氧根向负极移动,你可以这么想,其实是氢氧根移动过去了这一极才叫负极的,原电池其实没有外加推动力,不像电解池是强制移动过去的,它是自发的,而负极的定义是失电子的一级,并不要求必须是正或负离子的~
PS:现在知道是可以传图的哦~

C would rather 后如果是that从句的话,则需要用虚拟语气,用过去完成时表示与过去的事实相反,用过去时来表示与现在和将来的事实相反.woule rather 还有其他的用法“would rather+动词原形”是英语中常见的一个惯用句...

奥运会有一段很长的历史.第一个现代运动会在雅典举行,当时希腊于1896年加入.每四年,来自世界各地的运动员参加各种体育运动的比赛.其中最大的一个参与竞技的舞台,
“体育”是指体育在四个领域:跟踪、田野、道路和事件相结合.径赛项目,如跑步和跨栏赛跑,测试一个人的速度.为了赢得径赛项目,一个人需要比其他人走得更快.田赛项目,然而,测试的人能跳得高还是远的活动,例如跳远和跳高.他们也测试有人可以扔多远的活动,例如女子铅球、铁饼或标枪.和种族的马拉松散步被路活动.耐力测试.在联合事件,运动员们被要求参加一场比赛系列从每一个范畴.最著名的联合项目是十项全能.包括十项全能的十种不同的田径项目发生,持续了两天.自从十项全能全面体能测试的胜利者经常被称为“十项全能的世界上最伟大的运动员”.
虽然所有奥林匹克运动是平等的重要性,体育,在许多方面,最佳影片奥林匹克格言“更快、更高、更强”.人类的欲望.才能做的更好,跑得更快,更高翱翔,推动进一步是奥运会的全部内容.

How to Deal with the Exam Stress
Everyone may have the exam stress. A little bit of stress can be a good thing to us.If we have proper stress, we can think actively and work harder. Besides, it can remind us to review our lessons in time to remember them. So we can pass the exams easily.
However, if we have too heavy stress, we can’t sleep well at night and we may feel too tired. We may fear the exams too much and fail in the end.
In my opinion, to deal with stress, we’d better plan and prepare well. We should also form some good habits, such as enough exercise and healthy diets. Then we’ll feel relaxed and do well in the exams.

水汽不是气体 会融入原本的试剂中 不是在气柱里面 不算入氢气体积

BACDD
BCDAD
ADCDC
BDDBD
上面是我做的 下面是原文
It is well that young men should begin at the beginning and occupy the most subordinate positions.Many of the leading businessmen of Pittsburgh had a serious responsibility thrust upon them at the very threshold of their career.They were introduced to the broom,and spent the first hours of their business lives sweeping out the office.I notice we have janitors and janitresses now in offices,and our young men unfortunately miss that salutary branch of business education.But if by chance the professional sweeper is absent any morning,the boy who has the genius of the future partner in him will not hesitate to try his hand at the broom.It does not hurt the newest comer to sweep out the office if necessary.I was one of those sweepers myself.
Assuming that you have all obtained employment and are fairly started,my advice to you is “aim high”.I would not give a fig for the young man who does not already see himself the partner or the head of an important firm.Do not rest content for a moment in your thoughts as head clerk,or foreman,or general manager in any concern,no matter how extensive.Say to yourself,“My place is at the top.” Be king in your dreams.
And here is the prime condition of success,the great secret:concentrate your energy,thought,and capital exclusively upon the business in which you are engaged.Having begun in one line,resolve to fight it out on that line,to lead in it,adopt every improvement,have the best machinery,and know the most about it.
The concerns which fail are those which have scattered their capital,which means that they have scattered their brains also.They have investments in this,or that,or the other,here there,and everywhere.“Don’t put all your eggs in one basket.” is all wrong.I tell you to “put all your eggs in one basket,and then watch that basket.” Look round you and take notice,men who do that not often fail.It is easy to watch and carry the one basket.It is trying to carry too many baskets that breaks most eggs in this country.He who carries three baskets must put one on his head,which is apt to tumble and trip him up.One fault of the American businessman is lack of concentration.
To summarize what I have said:aim for the highest; never enter a bar room; do not touch liquor,or if at all only at meals; never speculate; never indorse beyond your surplus cash fund; make the firm’s interest yours; break orders always to save owners; concentrate; put all your eggs in one basket,and watch that basket; expenditure always within revenue; lastly,be not impatient,for as Emerson says,“no one can cheat you out of ultimate success but yourselves.”

for instance/for example
as the proverb/saying goes
what's more/furthermore
it is well konwn that/as konwn to all
in other words
thanks to
because of
我只是列举了常用的连接词,希望对你有帮助

六、电场
1.两种电荷、电荷守恒定律、元电荷：(e＝1.60×10-19C）；带电体电荷量等于元电荷的整数倍
2.库仑定律：F＝kQ1Q2/r2（在真空中）｛F:点电荷间的作用力(N),k:静电力常量k＝9.0×109N?m2/C2,Q1、Q2:两点电荷的电量(C),
r:两点电荷间的距离(m),方向在它们的连线上,作用力与反作用力,同种电荷互相排斥,异种电荷互相吸引｝
3.电场强度：E＝F/q（定义式、计算式)｛E:电场强度(N/C),是矢量（电场的叠加原理）,q：检验电荷的电量(C)｝
4.真空点（源）电荷形成的电场E＝kQ/r2 ｛r：源电荷到该位置的距离（m）,Q：源电荷的电量｝
5.匀强电场的场强E＝UAB/d ｛UAB:AB两点间的电压(V),d:AB两点在场强方向的距离(m)｝
6.电场力：F＝qE ｛F:电场力(N),q:受到电场力的电荷的电量(C),E:电场强度(N/C)｝
7.电势与电势差：UAB＝φA-φB,UAB＝WAB/q＝-ΔEAB/q
8.电场力做功：WAB＝qUAB＝Eqd｛WAB:带电体由A到B时电场力所做的功(J),q:带电量(C),
UAB:电场中A、B两点间的电势差(V)(电场力做功与路径无关),E:匀强电场强度,d:两点沿场强方向的距离(m)｝
9.电势能：EA＝qφA ｛EA:带电体在A点的电势能(J),q:电量(C),φA:A点的电势(V)｝
10.电势能的变化ΔEAB＝EB-EA ｛带电体在电场中从A位置到B位置时电势能的差值｝
11.电场力做功与电势能变化ΔEAB＝-WAB＝-qUAB (电势能的增量等于电场力做功的负值)
12.电容C＝Q/U(定义式,计算式) ｛C:电容(F),Q:电量(C),U:电压(两极板电势差)(V)｝
13.平行板电容器的电容C＝εS/4πkd（S:两极板正对面积,d:两极板间的垂直距离,ω：介电常数）
常见电容器
14.带电粒子在电场中的加速(Vo＝0)：W＝ΔEK或qU＝mVt2/2,Vt＝(2qU/m)1/2
15.带电粒子沿垂直电场方向以速度Vo进入匀强电场时的偏转(不考虑重力作用的情况下)
类平 垂直电场方向:匀速直线运动L＝Vot(在带等量异种电荷的平行极板中：E＝U/d)
抛运动 平行电场方向:初速度为零的匀加速直线运动d＝at2/2,a＝F/m＝qE/m
注:
(1)两个完全相同的带电金属小球接触时,电量分配规律:原带异种电荷的先中和后平分,原带同种电荷的总量平分；
(2)电场线从正电荷出发终止于负电荷,电场线不相交,切线方向为场强方向,电场线密处场强大,顺着电场线电势越来越低,电场线与等势线垂直；
3）常见电场的电场线分布要求熟记；
(4)电场强度（矢量）与电势（标量）均由电场本身决定,而电场力与电势能还与带电体带的电量多少和电荷正负有关；
(5)处于静电平衡导体是个等势体,表面是个等势面,导体外表面附近的电场线垂直于导体表面,导体内部合场强为零,
导体内部没有净电荷,净电荷只分布于导体外表面；
(6)电容单位换算：1F＝106μF＝1012PF；
(7）电子伏(eV)是能量的单位,1eV＝1.60×10-19J；
(8)其它相关内容：静电屏蔽/示波管、示波器及其应用等势面.
七、恒定电流
1.电流强度：I＝q/t｛I:电流强度(A）,q:在时间t内通过导体横载面的电量(C）,t:时间(s）｝
2.欧姆定律：I＝U/R ｛I:导体电流强度(A),U:导体两端电压(V),R:导体阻值(Ω)｝
3.电阻、电阻定律：R＝ρL/S｛ρ:电阻率(Ω?m),L:导体的长度(m),S:导体横截面积(m2)｝
4.闭合电路欧姆定律：I＝E/(r+R)或E＝Ir+IR也可以是E＝U内+U外
｛I:电路中的总电流(A),E:电源电动势(V),R:外电路电阻(Ω),r:电源内阻(Ω)｝
5.电功与电功率：W＝UIt,P＝UI｛W:电功(J),U:电压(V),I:电流(A),t:时间(s),P:电功率(W)｝
6.焦耳定律：Q＝I2Rt｛Q:电热(J),I:通过导体的电流(A),R:导体的电阻值(Ω),t:通电时间(s)｝
7.纯电阻电路中:由于I＝U/R,W＝Q,因此W＝Q＝UIt＝I2Rt＝U2t/R
8.电源总动率、电源输出功率、电源效率：P总＝IE,P出＝IU,η＝P出/P总
｛I:电路总电流(A),E:电源电动势(V),U:路端电压(V),η：电源效率｝
9.电路的串/并联 串联电路(P、U与R成正比) 并联电路(P、I与R成反比)
电阻关系(串同并反) R串＝R1+R2+R3+ 1/R并＝1/R1+1/R2+1/R3+
电流关系 I总＝I1＝I2＝I3 I并＝I1+I2+I3+
电压关系 U总＝U1+U2+U3+ U总＝U1＝U2＝U3
功率分配 P总＝P1+P2+P3+ P总＝P1+P2+P3+
10.欧姆表测电阻
(1)电路组成 (2)测量原理
两表笔短接后,调节Ro使电表指针满偏,得
Ig＝E/(r+Rg+Ro)
接入被测电阻Rx后通过电表的电流为
Ix＝E/(r+Rg+Ro+Rx)＝E/(R中+Rx)
由于Ix与Rx对应,因此可指示被测电阻大小
(3)使用方法:机械调零、选择量程、欧姆调零、测量读数｛注意挡位(倍率)｝、拨off挡.
(4)注意:测量电阻时,要与原电路断开,选择量程使指针在中央附近,每次换挡要重新短接欧姆调零.
11.伏安法测电阻
电流表内接法：电流表外接法：
电压表示数：U＝UR+UA 电流表示数：I＝IR+IV
Rx的测量值＝U/I＝(UA+UR)/IR＝RA+Rx>R真 Rx的测量值＝U/I＝UR/(IR+IV)＝RVRx/(RV+R)>RA [或Rx>(RARV)1/2] 选用电路条件Rx

看了题目,很简单,
假设磁场宽度大于2.5cm（上下加起来就是5cm了）,则水平向右射得最远的电子的方向应该是垂直向下方向射入的（由于受力是向上）,
但由于垂直方向磁场宽度为4cm,如果右界边大于4cm,则水平向右方向射的最远的电子（垂直向下入射的电子）在未射到右边界的时候就从垂直方向设射出磁场区域,就不能从右边界射出磁场.水平向右方向射得最远的电子都不能从右边界射出磁场,那么其它方向入射的电子更不可能从右边界射出磁场.
故要从右边界射出的电子,最低要求为右边界往右得小与4cm
同理可得,水平向上射入的电子,马上会往左运动,如果右边界变到左边,那么同理可以推得右边界为负的 4cm可以保证水平向上射入的电子能从边界射出.
综合起来所求边界X坐标就是-4

风铃在夜中摇晃
过中如歌过中如泣,
透是别离；
最后留下咆哮的大海
为么·于是未及的茫茫落叶中
似从四肢中后出

“有所做为”.
答案绝对正确,因为偶就是从内时候过来滴,而且,当时偶也搞不懂内啥意思,还专门请教老师了.

topic

=a+2,即pH=b的溶液pH值更大,即NaOH更浓,因此等体积混合,
pH在b的基础上相当于减小,即下降lg2
即,pH=b-lg2

设P的坐标为 （x,y）
高二应该学过向量的
如果要用向量可以PO向量为（x,y）同理得出PA PB的向量
然后角度cosp =cos=(ab的内积)/(|a||b|)
然后两个是相等的
化简方程就可以了 ,你试下不懂再追问我补充给你

1-5 BACBB 6-10 CABAC 11-15 AABBC 16-20 CACAB 21-25 BDBCB 26-30 ACCDB 31-35 BBDCC 36-40 CBDAC 41-45 BCADB 46-50 ADBCD 51-55 DBCCA 56-60 DADCB 61-65 DDCBA 66-70 DDCDD 71-75 BADAD

1.It is funny that _your dog can watch TV.______________________________
2.It worried us that _the English teacher didn't come to class this morning.____________________________
3.It appears that _you have had a fever,_______________________________

diamond glance endless flexinble

更正在括号处标明,总共九处错误!
楼主个别打字有误,不能保证绝对正确!

A (thirst改成thirsty) bee wen to a river to drink, and was carried away by the (run改成running) water. A kind bird picked a leave off a tree and threw (加入it) into the water in front of the bee. The bee was able to climb onto the leaf, and brought safely to the land. The bee thanked the bird for its kindness and then flew away. Not long (在after后面加入that 或 把after改成later), the bird was sitting on a branch (while改成when) a man began to aim his gun at it, but the bee saw (that改成what) the man was doing. So it flew into the man's eye and hurt him. The pain was so great that he was not able to shoot (去掉at) the bird, and the bird flew away. in the away. The bee whose life had been saved by the bird, (去掉and) was able to save (加入the) life of the bird.


如果你满意我的答案,敬请点击 “选为满意回答” ,谢谢!

应该是c用倒装

嘿~~~这里选C吧. 逗号前已经有了谓语的,就是has made,所以要填的不是谓语,而应该是非谓语动词. 四个答案里面只有CD才是非谓语. coming 可以表示伴随或者自然而然的结果. to come 表示目的或者意料之外的结果了,所以不对撒!

Dear Mike:
I heard that you will be taking a job at a nearby restaurant.I have a few tips which will improve your chances of being selected at this.First,you might want to arrive ten minutes earlier than the appointment time.Secondly,being polite is important!It's good pratice to show respect to everyone you meet,as this gives good first impressions.Thirdly,during the appointment,sit straight,look at the employer in his eyes,and speak loudly and clearly.This also gives good impressions,and makes the employer feel good.Remember to prepare answers to some common questions the employer might ask.I wish you good luck!
Best Wishes,
Li Hua
Dear Mike,
I have got the message that you are planning to take a part_time job in a restanrant near your university.I,m really glad to see that you would like to take vivid action to understand Chinese culture.So i,ll tell you some communicating rules to help you.Firstly,it,s very important to get there 10 minutes earlier,which will be polite.Secondly,whoever you will meet,whatever you will be asked,please don,t be nerverous,so prepare for the problems and questions in advance.By your effort,i believe that you must be able to answer the questions loudly and watch the people you meet.Lastly,make a good sitting position .I,m looking forward to your success.Good luck.

犯了典型错误,首先带电粒子进入电场会受到电场力,没有力平衡电场力于是做类似抛物线运动,从电场线方向看作匀加速直线运动.
穿过电场的时间越长,电场力做功越大.设vx=at
初速度变为2倍,初动能为4Ek,穿过的时间变成原来的二分之一,则vx=1/2at,原来电场做功为2Ek,那么现在电场力做功为1/4（2Ek),所以为4.5Ek

这句貌似不是句型转换,只是同义词填写吧.penniless和poor同义,还可以填impoverished等

Worn out 疲乏 疲惫不堪 精疲力竭