单项选择题

Passage through the Suez Canal is operated on a （） system．

A.convey
B.convoy
C.escort
D.conform

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单项选择题

On no account （）proceed without pilot in this water area．

A.the vessel
B.shall not vessel
C.the vessel should
D.should vessel

单项选择题

Monsoons are characterized by （）.

A.light，variable winds with little or no humidity
B.strong，gusty winds that blow from the same general direction all year
C.steady winds that reverse direction semiannually
D.strong，cyclonic winds that change direction to conform to the passage of an extreme low pressure system

单项选择题

Keep （） to that point,said the pilot．

A.straight
B.direct
C.forward
D.on