單項(xiàng)選擇題

At that time my ship and others were（）within 40 degrees of the compass.

A.yawing
B.movin
C.turning
D.pitching

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單項(xiàng)選擇題

Be careful（）mix the inflammable cargo with that kind.

A.do not
B.will not
C.shall not
D.not to

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Before entering a tank, always check the vapor content（）a combustible gas indicator.

A.with
B.by
C.of
D.for