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【单选题】
在IM0釆纳的分道通航水域, 规则要求穿越通航分道的船舶应与船舶的总流向成直角穿越,其目的是: Ⅰ、缩短穿越时间Ⅱ、便于它船发现该船的穿越意图Ⅲ、便于交通管制中心的监控Ⅳ,避免形成紧迫局面
A.
Ⅰ、Ⅱ、Ⅲ、Ⅳ
B.
Ⅰ、Ⅱ、Ⅲ
C.
Ⅰ、Ⅱ
D.
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举一反三
【单选题】下列哪种情形不属于特别重大事故:( )。
A.
造成30人以上死亡
B.
造成100人以上重伤(包括急性工业中毒,下同)
C.
造成1亿元以上直接经济损失
D.
繁忙干线客运列车脱轨18辆以上并中断铁路行车24小时以上;
【简答题】比较P-型离子泵、V-型质子泵、F-型质子泵和ABC超家族的异同。
【单选题】听力原文:W: How long does it take you to get to work? M: It's only a fifteen minute bus drive early in the morning but coming home from work is quite different it takes at least twenty or thirty minutes. ...
A.
15 minutes.
B.
45 minutes.
C.
35 minutes.
D.
30 minutes.
【单选题】听力原文:M: How come David is always so full of energy? W: He has a strange but highly effective way of sleeping. M: What is that? W: He takes a short sleep for an hour every six hours and has a total of ...
A.
It's effective.
B.
It's strange.
C.
It's the best.
【判断题】热继电器的作用是对电路进行短路保护。
A.
正确
B.
错误
【判断题】熔断器对电动机进行短路保护, 热继电器对电动机进行过载保护。[ ]
A.
正确
B.
错误
【简答题】Clean B/L
【简答题】比较 P- 型离子泵、 V- 型质子泵、 F- 型质子泵和 ABC 超家族的异同。
【单选题】Tony could help the city parks. [     ]
A.
clean
B.
clean up
C.
clean out
D.
cleans up
【简答题】Napoga is a 12-year-old girl in Ghana, Africa. It is hard for her family to get clean water. Every morning, she leaves home at half past five to get clean water for her family in a village far away. I...
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