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【单选题】
下列四种环己烷衍生物其分子内张力（Enb）从大到小顺序应该( )【图片】A.
A ＞ B ＞ C ＞ D
B.
A ＞ C ＞ D ＞ B
C.
D ＞ C ＞ B ＞ A
D.
D ＞ A ＞ B ＞ C
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【单选题】在使用搜索引擎检索时,如果发现检索结果中,有某一类网页并不是自己所想要的,并且这些网页都包含特定的关键词,在这种情况下可以考虑使用( )语法,去除所有包含特定关键词的网页。
A.
空格
B.
减号
C.
加号
D.
乘号
【单选题】砌体结构以砖、石或砌块用于墙、柱和基础等承重构件,这些材料力学性能是( )?
A.
抗压强度高，但抗拉强度低
B.
抗拉强度高，但抗压强度低
C.
抗压强度及抗拉强度均高
D.
抗压强度及抗拉强度均低
【单选题】Main engine room control console alarms are to be of the self monitoring type, meaning that an open circuit to a particular alarm circuit will _____.
A.
cause an alarm condition
B.
secure power to the indicator
C.
secure power to the monitored device
D.
automatically recluse within 10 seconds
【简答题】S1:Where are the fire alarms?S2:The fire alarms are in many places on board,such as in the corridor, on deck, in the galley, on the wall next to the engine room, etc.Q:Which of the following places is...
【简答题】S1:Where are the fire alarms?S2:They are in many places, such as the corridor, galley, on the wall next to the engine room,etc.Q:What are they talking about?A. Location of the fire extinguishers B. Lo...
【单选题】The alarms of engine room centralized alarm and monitoring system don’t include ______.
A.
voice and light alarm in engine room
B.
extension alarm
C.
carbon dioxide discharging alarm
D.
3 minutes delayed alarm
【单选题】在使用搜索引擎检索时,如果发现检索结果中,有某一类网页并不是自己所想要的,并且这些网页都包含特定的关键词,在这种情况下可以考虑使用( )语法,去除所有包含特定关键词的网页。
A.
加号
B.
减号
C.
双引号
D.
空格
【单选题】Which of the following stateraents does not belong to preparations for standby?
A.
The various supply tanks， filters valves and drains are all to be checked.
B.
all control equipment and alarms should be examined for correct operation.
C.
The fuel oil system is checked and circulated with hot oil.
D.
The fuel supply is shut off and the engine will quickly slow down.
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