关于地球同步卫星,下列说法正确的是() A.俄、美和中国发射的同步卫星,都在赤道

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问题:

关于地球同步卫星,下列说法正确的是(    )

A.俄、美和中国发射的同步卫星,都在赤道上空的同一条轨道上运行

B.各国发射的同步通讯卫星,轨道各不相同

C.同步卫星都具有跟地球自转相同的角速度

D.同步卫星离开地面的高度和环绕速度都是一定的

考点:地球同步卫星
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用关联词语将句子组成三个意思不同的句子。   

①大象会笑。   ②此刻所展示的是它们独特的笑颜。  

1.                                                                                       

2.                                                                                        

3.                                                                                        

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我国的爱鸟周是每年()月的最后一个星期。

A、三

B、四

C、五

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股份有限公司依法向100人的特定对象发行证券属于公开发行证券。( )

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"Bad eyesight" A young man was called up for army service, but he didn’t want to become a soldier. When he went for his medical exam, ____(16)____ The doctor pointed to the eye chart on the wall and said," ____(17)____ " "The doctor line of what"the young man asked. " ____(18)____ "the doctor replied. "What chart"the man asked. " ____(19)____ "the doctor said. "What wall"the man said, Finally,the doctor decided that the man’s eyes were not good enough for army service. That evening the same young man was at a movie when another man came in and sat next to him in the dark. When the light went out, the young man saw that his neighbor whohad examined him earlier. Immediately he said,"Excuse,madam, ____(20)____ "

17().

A. but does this bus go to Main Street

B. The one on the wall.

C. he pretended that his eyesight was very bad.

D. Please read the top line.

E. he passed the exam.

F. Shall we go to the movies

G. The top line of the chart.

题型:选择题

南京A公司与北京B公司约定采用合同书订立合同,2010年1月1日在上海订立了一份书面合同,A公司当日签字盖章后交B公司,2010年1月5日,A公司已经履行了主要义务,B公司已经接受,B公司在1月10日将该合同带回到北京签字盖章,该合同成立时间为( )。

A.自A公司与B公司口头协商一致并签订备忘录时成立
B.自A公司在南京签字盖章时成立
C.自B公司在北京签字盖章时成立
D.2010年1月5日,A公司已经履行了主要义务而B公司接受时成立

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