7. Along with his letter was his promise _______ he would attend the
opening ceremony the coming month.
A. which B. that C. what D. whether
6. Since he often travels on business, he can ________ himself to sleeping in any place he can find.
A.devote B.accustom C.force D.reduce
5. It was most _______ of you to lend me the money when I was in trouble.
A.grateful B.generous C.gentle D.guilty
4.--- Mr Wang, I got zero on Answer Sheet One. Could you help me correct
it?
--- No, it_______ be marked by the machine. Mark your test number
with a pencil 2B next time.
A. need B. can C. shall D. may
3. --- I really thought that I would win the match.
--- Oh, well, _______ Henry.
A. congratulations B. better luck next time
C. best wishes D. take your time
2. , a form must be filled in.
A. To ask for his job B. In order to get his job
C. Making request for his job D. If you want to get this job
第一节:单项填空(共15小题;每小题1分,满分15分)
从A、B、C、D四个选项中,选出可以填入空白处的最佳选项。
1. The new law has come into effect, and _____ number of wild animals here is on ______ increase now.
A. the; the B. a; the C. the; 不填 D. a; 不填
18.(12分)如图14所示,C是放在光滑的水平面上的一块木板,木板的质量为3m,在木板的上面有两块质量均为m的小木块A和B,它们与木板间的动摩擦因数均为μ;最初木板静止,A、B两木块同时分别以方向水平向右的初速度v0和2v0在木板上滑动,木板足够长,A、B始终未滑离木板。求:
(1)木块B从刚开始运动到与木板C速度刚好相等的过程中,木块B所发生的位移;
(2)木块A在整个过程中的最小速度。
天津市五校2010届高三上学期期中联考物理试卷
17.(10分)如图13所示,一平板车静止在光滑水平面上,一人静止站立在车上,已知平板车和人的总质量为M,平板车的高度为h,在平板车右端另外放一质量为m且与车无摩擦的小球,若人将小球向右踢出,使小球恰好落在地面上的A点,此时移动后的平板车右端距离A点的水平距离为s,人相对于平板车始终静止。求:
(1)小球被踢出后平板车的速度;
(2)若将平板车固定在地面上,人用同样的方式将小球向右踢出,平板车右端距离小球落地点的水平距离为多少?
16. (10分)宇航员在月球表面完成下面实验:在一固定的竖直光滑圆弧轨道内部最低点静止一质量为m的小球(可视为质点)如图12所示,当施加给小球一瞬间水平冲量I时,刚好能使小球在竖直面内做完整圆周运动.已知圆弧轨道半径为
,月球的半径为R,万有引力常量为G,若在月球表面上发射一颗环月卫星,所需最小发射速度为多大?轨道半径为2R的环月卫星周期为多大?
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