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【单选题】
骨盆最狭窄的平面是A.
人口平面
B.
出口平面
C.
中上段平面
D.
中骨盆平面
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皮皮学刷刷变学霸
举一反三
【单选题】The magician picked three persons______ from the audience and asked them to help him with the performance.
A.
by accident
B.
on occasion
C.
at random
D.
on average
【单选题】The magician picked out several persons ______ from the audience and asked them to help him with the performance.
A.
by accident
B.
on average
C.
on occasion
D.
at random
【单选题】The magician picked some persons from the audience _____ and asked them to help him with the performance．
A.
by accident
B.
in vain
C.
at random
D.
on average
【单选题】船舶在台风进路上,台风中心即将来临,此时北半球如何操纵船舶离开险区__?
A.
右尾受风驶向可航半圆
B.
右首受风滞航
C.
右首顶风全速驶离
D.
左尾受风驶向可航半圆
【单选题】The magician picked several persons ______ from the audience and asked them to help him with the performance.
A.
by accident
B.
at random
C.
on occasion
D.
on average
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