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【单选题】
回转流的特点有（）。 Ⅰ.在一个潮汐周期内流向改变360度； Ⅱ.流速、流向的变化是：在某一方向上由弱，然后改向； Ⅲ.没有流速为零的时刻。A.
Ⅰ、Ⅱ
B.
Ⅰ、Ⅲ
C.
Ⅱ、Ⅲ
D.
Ⅰ、Ⅱ、Ⅲ
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反馈参考答案：
举一反三
【简答题】鸦胆子油注射液属于
【单选题】A doctor, together with two nurses,_____sent to the mountain village.
A.
have
B.
have been
C.
has
D.
has been
【简答题】适应的涵义
【单选题】It was the third time that she_____ to this mountain village to see the children. [ ]
A.
had come
B.
has come
C.
came
D.
would come
【单选题】As no one in the small village knew nothing about Medicine, Mrs. Smith, a former nurse, had to work as a doctor.
A.
knew
B.
nothing
C.
had to
D.
as
【简答题】It was a village in India. The people were poor but they were happy. After all, their forefathers had lived in the same way for centuries. Then one day, some visitors from the city arrived. They told ...
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