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【简答题】
侧在侧立投影面上的投影具有 性且与投影轴相互倾斜。
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反馈参考答案：
举一反三
【单选题】我国的人造卫星围绕地球的运动,有近地点和远地点,由开普勒定律可知卫星在远地点运动速率比近地点运动的速率小,如果近地点距地心距离为 R 1 ,远地点距地心距离为 R 2 ,则该卫星在远地点运动速率和近地点运动的速率之比为 ( )
A.
R 1 / R 2
B.
R 2 / R 1
C.
【单选题】听力原文：W: How beautiful! How long have you had it? M: Only two weeks. W: How far have you been in it? M: Not too far. Just to a picnic. What are the speakers talking about?
A.
Maybe a picnic.
B.
Maybe something new.
C.
Maybe a new car.
【简答题】We don’t agree with the practice that once the certificate is issued there is no further check on the language 8. pro 1) ___________ of the person.
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