卷子测试题目5单元 6单元 7单元

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minshang 共回答了21个问题 | 采纳率90.5%
2、已知两颗人造地球卫星的轨道半径rA=2rB,则它们的线速度、角速度、加速度和周期之比正确的是( )
(A)VA:VB= (B)
(C)aA:aB=1:4 (D)TA:TB=
3、人造卫星环绕地球运动的速率v=,其中g为地面处的重力加速度,R为地球半径,r为卫星离地球中心的距离,下面哪些说法是正确的?
(A)从公式可见,环绕速度与轨道半径的平方根成反比;
(B)从公式可见,把人造卫星发射到越远的地方越容易;
(C)上面环绕速度的表达式是错误的;
(D)以上说法都错.( )
4、地球同步卫星是指相对于地面不动的人造地球卫星:
(A)它可以在地面上任一点的正上方,且离地心的距离可按需要选择不同值;
(B)它可以在地面上任一点的正上方,但离地心的距离是一定的;
(C)它只能在赤道的正上方,但离地心的距离可按需要选择不同值;
(D)它只能在赤道的正上方,且离地心的距离是一定的.( )
5、已知下面哪组数据可以计算出地球的质量M地(引力常数G为已知)( )
(A)月球绕地球运行的周期T1及月球到地球中心的距离R1
(B)地球“同步卫星”离地面的高度h
(C)地球绕太阳运行的周期T2及地球到太阳中心的距离R2
(D)人造地球卫星在地面附近的运行速度v和运行周期T3
6、假如一做圆周运动的人造地球卫星的轨道半径增大到原来的2倍,仍做圆周运动,则( ).
(A).根据公式v=ωr,可知卫星运动的线速度将增大到原来的2倍
(B).根据公式F=,可知卫星所受的向心力将减小到原来的1/2
(C).根据公式F=,可知地球提供的向心力将减小到原来的1/2
(D)根据上述B、C中给出的公式,可知卫星运动的线速度将减小到原来的
7、人造地球卫星绕地球做匀速圆周运动,设地球半径为R,地面处的重力加速度为g,则人造地球卫星( ).
(A)绕行的线速度最大为
(B)绕行的周期最小为2π
(C)在距地面高为R处的绕行速度为
(D)在距地面高为R处的周期为2π
8、如图所示,有A、B两个行星绕同一恒星O做圆周运动,运转方向相同,A行星的周期为T1,B行星的周期为T2,在某一时刻两行星第一次相遇(即两行星相距最近)则( )
(A)经过时间t=T1+T2两行星将第二次相遇
(B)经过时间两行星将第二将相遇
(C)经过时间两行星第一次相距较远
(D)经过时间两行星第一次相距最远
9、设地球的质量为M,半径为R,其自转角速度为ω
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项目x05水上项目x05球类x05射击x05体操x05田径x05力量型x05总计
金牌数x058x05x05x05x05x05x05
占百分比x0525%x0525%x0513%x053%x056%x0528%x05100%
(5分)
6.某超市两次降低电磁炉的售价,第一次比原价降低了20%,降价后每台电磁炉卖380元,第二次又比第一次降价后的价格降低了10%,现在每台电磁炉的价格比原价便宜了多少元?(5分)
7、
已知图中两条直角边的长度,求出图中以斜边为直径所作圆的面积.(5分)
8、A车和B车同时从甲、乙两地相向开出,经过5小时相遇.然后,它们又各自按原速原方向继续行驶3小时,这时A车离乙地还有135千米,B车离甲地还有165千米.甲、乙两地相距多少千米?(5分)
初一下册英语启航卷子答案
tianzeizei1年前1
_妲己_ 共回答了152个问题 | 采纳率58.6%
你发题目我帮你 采纳谢谢*罒▽罒*
期末考试卷子答案
儒艮1年前3
hxhxin 共回答了8个问题 | 采纳率
我也想要
初二上册英语,卷子改错,
初二上册英语,卷子改错,

lishi991年前4
沐紫心-瑶 共回答了24个问题 | 采纳率83.3%
21 A ( in New York 可知,代替不可数名词用that
22 B
23 C 固定用法 between ... and ...在……之间.
24 A 形容词修饰不定代词要放在代词之后,肯定用SOMETHING
英语卷子1. The news _________good news, the sitcoms are ________
英语卷子
1. The news _________good news, the sitcoms are ____________.
A. are, educational B. is, education C. are, education D. is, educational
2. He expects ___________good grades, but I hope __________healthy.
A. to get, keep B. get, to keep C. to get, to keep D. gets, keeping
3. They are ___________this problem, but I don’t take part in the ___________(讨论).
4. I want to ___________who broke the window.
A. look for B. look after C. find out D. find
5. I am ready ___________cook dinner for my family, I am getting ready ________it.
A. to, at B. for, to C. to, for D. to, to
6. She wants to take her mother’s __________to clean the room.
A. room B. seat C. job D. place
7. The game show is _____________(令人愉快的)。
8. I will show you the photo if it __________tomorrow.
A. will come out B. is going to come out C. comes out D. came out
9. I can’t ___________(忍受)the scary movie, but I don’t __________(介意)the action movie.
10. Would you mind my ____________(成为)an actor?
11. The _______________(卡通片) are _________________(没有意义).
12. What _______________(发生了) to you?
13. Zhejiang ________________(以…而出名) the Yue _____________(文化).
14. He is ___________(富有) than me, because he is a ________________(成功) businessman.
15. He ___________(可能) be too young, he couldn’t ______________(穿衣) himself.
16. ____________, he passed the exam, but I I didn’t, I am an _____________boy. (luck)
17. They’ll try _________best to finish the work by ___________.(他们)
ahehe1年前1
开心所以微笑 共回答了20个问题 | 采纳率85%
1.D
2.C
3.discussing, discussion
4.C
5.C
6.D
7.enjoyable
8.C
9.stand, mind
10.being
11.cartoons, meaningless
12.happened
13.is famous for, culture
14.richer, successful
15.may, dress
16.Luckily, unlucky
17.their, themselves
高中政治必修一优化学案卷子答案
vi28011年前1
tuturabit 共回答了23个问题 | 采纳率87%
你把不会的直接发上来呗
英语卷子,21.I would have gone to the concert,if I____time.A.had
英语卷子,
21.I would have gone to the concert,if I____time.
A.had had
B.have had
C.had
D.would have had
22.I can't speak Japanese,but I do wish I _______.
A.can
B.could
C.had
D.spoke
23.Is _____ true that the scientist will give us a lecture next week?
A.this
B.that
C.it
D.what
24.If John ____ tomorrow,what would you do?
A.were not to come
B.will not come
C.would not come
D.had not come
25.He lost his job last week,so he was ______.
A.worried
B.happy
C.well
D.easy
26."Did he miss his stop?" "The bus was so crowded that he had a hard time ___ ."
A.got off
B.getting off
C.to get off
D.get off
27.Now that the flowers _____,the garden _____ good.
A.bloom,smell
B.are blooming,smells
C.bloom,is smelling
D.are blooming,is smelling
28."Why did you phone the Service Centre?" " _______them to look after my son while I am away."
A.Ask
B.Asking
C.To ask
D.For asking
29.The students ___ the distance to their college in two hours by car.
A.cover
B.spend
C.cross
D.step
30.The homework is very ______ to do.
A.difficult
B.dirty
C.district
D.distant
31.For many years John kept coming ___ new and good ideas.
A.out with
B.at with
C.off with
D.up with
32.Where are you going in the ______?
A.home
B.holiday
C.history
D.factory
33.We ___ on a trip at dawn.
A.set for
B.set out
C.set in
D.set at
34.Why are you so ____?You never look happy.
A.afraid
B.lucky
C.bad
D.sad
35.If he ____drunk,he wouldn't have lost control of the car.
A.wasn't
B.weren't
C.hasn't been
D.hadn't been
36.It’s ____that the policy was a failure.
A.evident
B.sure
C.possible
D.impossible
37.The Premier and the Foreign Minister ________present at the state banquet last night.
A.are
B.was
C.were
D.had
38.His remarks were a bit ___ place.
A.in
B.for
C.against
D.out of
39.She fell asleep at last,but in no time at all the pain in her back ___ her again,sharp and insistent.
A.conquered
B.wakened
C.absorbed
D.retired
40."I'm thirsty,and I want to drink this water." "What!It is not good _______."
A.for drinking
B.to be drunk
C.to drink
D.drinking
41."He wouldn't have been able to come,even if I had invited him." "I'm not so sure.I think____ ."
A.he could come if you invited him
B.he could have come if you invited him
C.he would have come if you invited him
D.he could have come if you had invited him
42.He devotes himself to ____ the poor and needy.
A.relieving
B.visiting
C.inspecting
D.examining
43.Are you ___ with your present salary?
A.content
B.contented
C.contained
D.intend
44.What _____ you _____ when the fire ______ out?
A.are,doing,break
B.did,do,was breaking
C.were,doing,broke
D.did,do,broke
45.What would you like to eat?I’d like some _____.
A.cake
B.cap
C.color
D.cup
随时能叫嚣1年前1
ss无赖 共回答了19个问题 | 采纳率89.5%
CBCAA BBCAA DBBDD ACDBC DAACA
英语课时作业还有卷子1.If the doctor hadn't come on time,he ______.A.wo
英语课时作业还有卷子
1.If the doctor hadn't come on time,he ______.
A.would have die B.will have die C.dead D.dies
2.—If I go to the old man's home ,I'll bring them some flowers.
—______.
A.So will I B.So I will C.So do I D.So I do
3.Help yourself to some chicken,children.(改错)
娴灵1年前1
小嘴丫头 共回答了25个问题 | 采纳率80%
1.a
2.c
3.Help yourself some chicken,children
6年级数学卷子6年级卷子
天堂鸟20021年前1
龙渊1982 共回答了29个问题 | 采纳率86.2%
一、填空题(每空2分,共20分)
1)一个圆的直径是5厘米,这个圆的周长是( )厘米,面积是( )平方厘米.
2)用圆规画一个周长是9.42厘米的圆,圆规两角端应量取( )厘米.
3)扇形的半径是2分米,圆心角度数是72°,它的面积是( )平方分米.
4)一个圆的周长是2πr厘米,把这个圆分成两个半圆,其中一个半圆的周长是( )厘米.
5)一个圆心角是36°的扇形的面积是9平方厘米,和扇形半径相等的圆的面积是( )平方厘米.
6)某单位开会时出勤35人,出勤率正好是87.5%,后来又有1人请假离去,这时出勤率是( )
7)把一个圆形纸片等分后沿半径剪开,再拼成一个近似的长方形.已知圆的面积为12.56平方厘米,拼成的长方形的周长是( )厘米.
8)如右图,求阴影部分面积,列式是( ).
9)0.5的倒数是它本身的( )%
二、判断题(每空2分,共10分)
1)所有圆的周长和直径的比都是22 :7( )
2)一种图书初上市时打八折,后又提价20%,结果仍是原价.( )
3)扇形的半径扩大3倍,圆心角扩大2倍,扇形的面积就扩大6倍.( )
4)圆心角是90°的扇形面积是所在圆面积的25%( )
5)右图有4条对称轴.( )
三、选择题(每空2分,共10分)
1)正方形、长方形和圆各一个,如果它们的周长相等,那么面积最小的是( ).
A、正方形 B、长方形 C、圆 D、无法比较
2)a%去掉百分号后,就( ).
A、扩大10倍 B、缩小100倍 C、扩大100倍 D、大小不变
3)一个大圆的半径恰好是一个小圆的直径,这个小圆的面积是大圆面积的( ).
A、12 B、( 12 )2×3.14 C、18 D、14
4)钟面上分针旋转三圈时,时针旋转过的角是( ).
A、锐角 B、直角 C、钝角 D、平角
5)在下列图形中,阴影部分与空白部分的周长和面积都相等的是( ).
四、操作题(每题2分,共8分)
1)根据下面的条件画圆.(标出半径)
①半径=2厘米 ②面积=28.26平方厘米 ③周长=25.12厘米
2)如图,以直角三角形的斜边AB为直径画圆,由图看出:这个圆经过点( ).
五、求阴影部分面积(每题3分,共12分)
六、应用题(每题5分,共40分)
1)在一块直径是18米的圆形花圃的四周围上木栅栏,木栅栏的长是多少?
2)地球赤道一周的长大约是40000千米,地球的半径大约是多少千米?(保留整数)
3)一个圆的半径是2分米,求它的周长和面积各是多少?如果这个圆的半径增加原来的50%,它的周长和面积各增加百分之几?
4)两个连在一起的皮带轮,大轮半径0.54米,小轮半径0.18米,大轮转一周,小轮转几周?
5)一个正方形的一边减少10%,另一边增加2米,得到一个长方形,这个长方形面积与原正方形面积相等.原正方形边长是多少米?
6)某工厂原有工人450人,其中女工占36%,因生产需要又招进一批女工,这时女工人数占全工厂工人总数的40%,又招进女工多少人?
7)彤彤在2点到3点之间解一道题,开始时分针与时针正好重合,解完题时两针正好反向成一条直线,求彤彤解题的起始时间?她解题共用了多少时间?
8)小明调查了本班学生的兄弟关系,调查结果如下:
A、有哥哥的学生是全班学生人数的55%
B、有弟弟的学生是全班学生人数的50%
C、既有哥哥,又有弟弟的学生数是全班人数的25%
D、既没有哥哥,又没有弟弟的学生有8名
根据以上数据试求小明班上共有学生多少名?
七、附加题(第一题15分,第二题5分)
1)
①上图中的(a)、(b)、(c)、(d)为四个平面图.数一数,每个平面图各有多少个顶点?多少条边?他们分别围成了多少个区域?请将结果填入下表:
顶点数 边数 区域数
(a) 4 6 3
(b)
(c)
(d)
②观察上表,推断一个平面图的顶点数、边数、区域数之间有什么关系?
③现已知某个平面图有999个顶点,且围成了999个区域,试根据以上关系确定这个平面图有多少条边?
2)A、B、C、O四个小镇之间的道路分布如图所示,其中A、O两镇相距20千米,B、O两镇相距30千米.某天甲、乙二人同时从B镇出发,甲到达O镇后再向A镇走,到达A镇后又立刻返回,而乙到达O镇后直接向C镇行进.丙从C镇与甲、乙两人同时出发,在距离O镇15千米处与乙相遇.当丙到达O镇后又向A镇前进,在与O镇相距6千米的地方与甲相遇.已知甲、乙的速度比为8 :9,求O、C两镇之间的距离.
一、填空题
1、15.7 19.625
2、1.5
3、2.512
4、πr+2r
5、 90
6、85%
7、16.56
8、 ×π×( - )
9、400
二、判断题 1 × 2 × 3 × 4 √ 5 √
三、选择题 1 B 2 C 3 D 4 B 5 C
四、 1) r=2 厘米 r= 3厘米 r=4厘米 2) A B C 三点
五、 1)9.87 2)26.75 3)22 4)5.72平方厘米
六、
1)56.52米 2)6369千米 3)12.56分米.12.56平方分米.50% . 125%
4)3周 5)18米 6)由男生人数不变考虑 ,招进女生人数为:450×(1- )÷(1- )-450=30(人)
7) 开始解题时间:2点10 分,解题结束时间:2点43 分,共用时间32 分
8)8÷[1-(55%+50%-25%)]=40(名)
七、
1)顶点数边数区域数
顶点数 边数 区域数
(a) 4 6 3
(b) 8 12 5
(c) 6 9 4
(d) 10 15 6
顶点数+区域数=边数+1 边数=999+999-1=1997
2) 乙、丙相遇时,乙行了45米,甲行了40米.甲、丙相遇时,甲行了10+20-6=24米,丙行了15+6=21米.甲,丙速度比
为 8:7. 甲,乙,丙速度比为 8:9:7. 所以乙行45米时,丙行35米,所以两镇距离为35+15=50米.
英语卷子作文
英语卷子作文


lin777851241年前1
失败我 共回答了18个问题 | 采纳率88.9%
2
Live In a Big City
In the eyes of many people,city life is attractive with all its advantages and conveniences.
People can buy almost all kinds of things at supermarkets or shopping malls,dine out in good
restaurants,and more important,they can have more educational opportunities.
However,with the expansion of the city,more and more people are flowing into the big
city,the traffic is heavier and heavier,the pollution is more and more serious,and the living
condition is worse and worse.
Most people love the advantages of city life,but a big city also has its disadvantages.