【名词&注释】
救生艇(boat)、救生筏(life raft)、排气口(exhaust port)、救生设备(survival equipment)、落水者(fall in water person)、救生衣(life jacket)、救生圈(buoy)、气缸中心线
[单选题]落水者在水温为0℃的情况下，只能维持生命约：
A. 15分钟
B. 30分钟
C. 45分钟
查看答案&解析
举一反三：
[单选题]Which of the following is NOT mentioned in this passage?
A. There may be oil vapor in the engine room
B. Pipes and fittings may be damaged if explosion takes place
C. The cooler should be drained
D. Bursting caps must be fitted
[单选题]排气口与扫气口分别设在气缸中心线相对两侧的缸套，其换气形式称为()
A. 直流
B. 回流
C. 横流
D. 半回流
[单选题]When the refrigeration demand is small,_______.
A. the expansion valve will move toward the wide open position
B. the expansion valve will move toward the closing position
C. the feeler bulb will conveys the high temperature
D. the superheat degree will raise
[单选题]救生设备主要包括：
A. 救生艇、救生衣(life jacket)、救生圈(buoy)
B. 救生筏、救生衣(life jacket)、救生圈(buoy)
C. 救生艇、救生筏、救生衣(life jacket)、救生圈(buoy)
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