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【简答题】
质量为 m 的探月航天器在接近月球表面的轨道上飞行,其运动视为匀速圆周运动.已知月球质量为 M ,月球半径为 R ,月球表面重力加速度为 g ,引力常量为 G ,不考虑月球自转的影响,则航天器的 ( ) (6.0分) A. B. C. D.
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【简答题】What are they doing for holiday? They are happy because they are on holiday. Mary is visiting her aunt in Paris. It is a very famous city. And it is a good place to go shopping! Tom is fishing in the ...
【单选题】-What________Betty________in the summer? -She visited her aunt near the sea. [ ]
A.
does ; do
B.
did ; did
C.
does ; did
D.
did ; do
【简答题】二、 简答题 1、 单片机驱动蜂鸣器的方法有哪些,如何驱动?
【单选题】—Look! Here comes a boy! Who is he? —He's my ______. [ ]
A.
Aunt Mary
B.
Mary Aunt
C.
Cousin Tony
D.
Tony Cousin
【单选题】______ at the terrible news that I didn’t know what to say.
A.
So sad Mary looked
B.
So sad did Mary look
C.
So sadly Mary looked
D.
So sadly did Mary look
【单选题】---- ________ do you call the woman with long hair? ---- Aunt Mary.
A.
How
B.
Who
C.
Which
D.
What
【简答题】What present did Mary give Kate? ______of detective stories．
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