单项选择题

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A.To spread our knees and legs.
B.To put one knee on each side of the box.
C.To keep our back straight.
D.To put our hands under the object in front of us.
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单项选择题
A.Because the old one could not transfer signals clearly.B.Because the old one could only send two messages along the same line simultaneously.C.Because the old one could not send messages quickly enough.D.Because the old one could not send more than one message at the same tim
A.Because the old one could not transfer signals clearly.
B.Because the old one could only send two messages along the same line simultaneously.
C.Because the old one could not send messages quickly enough.
D.Because the old one could not send more than one message at the same tim
单项选择题
A.Because millions of men died in the war.B.Because women had proved their worth.C.Because women were more skillful than men.D.Because factories preferred to employ women.
A.Because millions of men died in the war.
B.Because women had proved their worth.
C.Because women were more skillful than men.
D.Because factories preferred to employ women.
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