8. - Have you ever read J. K. Rowling’s “Harry Potter” series?
-Yes. While in Britain,I ____them a couple of times.
A.have read B.read C.had read D.would read
7.____ she first heard of the man referred to.
A.That was from Charles B.It was Charles whom
C.It was from Charles that D.It was Charles that
6.The primary purpose is to ____ the public those achievements in the scientific research about botany.
A.make known by B.make known to
C.make know to D.make knowing by
5.Mum turned down my suggestion ____ Dad spoke in favor of my idea.
A.since B.while C.when D.as
4. - Now,where is my straw hat?
-____!Father’s calling us downstairs.
A.Take your time B.Don’t worry
C.Come on D.Take it easy
3.Cooperman and Teller are ____ of selling $4,700 worth of heroin to a number of drug users.
A.accused B.attached C.accustomed D.charged
2.The environmentalists said wild goats’____ on the vast grasslands was a good sign of the better environment.
A.identification B.absence C.attendance D.appearance
第一节:语法和词汇知识(共15小题;每小题1分,满分15分)
1.As ____ consequence, ____ fruits such as peaches and pears are in fact related, although they are different at ____ first sight.
A.a; the; the B.the; /; the C.a; /; / D.a; the; /
16.如图所示,一辆有四分之一圆弧的小车停在不光滑的水平地面上,质量为m的小球从静止开始由车的顶端无摩擦滑下,且小车始终保持静止状态.试分析:当小球运动到什么位置时,地面对小车的静摩擦力最大?最大值为多少?
15.质量为m的登月器与航天飞机连接在一起,随航天飞机绕月球做半径为3R( R为月球半径)的圆周运动。当它们运行到轨道的A点时,登月器被弹离, 航天飞机速度变大,登月器速度变小且仍沿原方向运动,随后登月器沿椭圆登上月球表面的B点,在月球表面逗留一段时间后,经快速起动仍沿原椭圆轨道回到分离点A并立即与航天飞机实现对接。已知月球表面的重力加速度为g月。试求:
(1)登月器与航天飞机一起在圆周轨道上绕月球运
行的周期是多少?
(2)若登月器被弹射后,航天飞机的椭圆轨道长轴为8R,则为保证登月器能顺利返回A点,登月器可以在月球表面逗留的时间是多少?
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