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【单选题】
货船短时间停航的重大故障,停航时间规定为______。A.
不超过2 h
B.
不超过3 h
C.
不超过5 h
D.
不超过6 h
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反馈参考答案：
举一反三
【简答题】Discuss the optical amplifier in optical fiber communication.
【单选题】Janet says that she _____.
A.
loves boats
B.
has never punted before
C.
isn’t used to boats
D.
is scared she might fall in
【简答题】51单片机的CPU是 位的。
【简答题】Janetsays that she _____.A. (a) loves boats B. (b) has never punted before C. (c) isn’t used to boats D. (d) is scared she might fall in
【简答题】Janet
says that she _____.A. loves
boats B. has
never punted before C. isn’t
used to boats D. is scared she might fall in
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