航行中的船舶大风浪中主机故障丧失动力,应釆取()措施。
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船舶在大风浪中顺浪航行时,为避免出现尾淹或打横现象,应果断釆取()的措施。
A. 只能改向变速无效
B. 改变航向和改变船速
C. 只能变速改向无效
D. 只能减速不能增速
I should not turn my back ___ him now that he's ill and poor, because he has always been kind ___ me.
A. on; for
B. on; to
C. to; for
D. against; to
The house is dark; the Turners ___ to bed.
A.should go
B.should have gone
C.must go
D.must have gone
He is off to Paris again tomorrow. He tells me that, with this journey, he ___ there and back twenty times.
A.will be
B.will have been
C.will go
D.will have gone