A vessel may be unable to take proper and effective action due to the speed（）too high or，in some circumstances，too low.<br>A:is<br>B:is to be<br>C:will be<br>D:being

A vessel may be unable to take proper and effective action due to the speed（）too high or，in some circumstances，too low.
A:is
B:is to be
C:will be
D:being

出自：海船船员证

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