皮皮学，免费搜题
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【单选题】
二副的基本职责包括:1负责管理邮件存放,装卸和交接工作;2按时向大副提出所管仪器设备的修理项目;3按时校正船钟,航行中跨时区负责拨钟;4定期养护操舵仪A.
1234
B.
123
C.
234
D.
124
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皮皮学刷刷变学霸
举一反三
【单选题】Heat that is known to be added to or removed from a substance but no temperature change is recorded is called as ______:
A.
entropy
B.
enthalpy
C.
latent heat
D.
specific heat
【多选题】慢性阻塞性肺气肿的发病与下列哪几个因素有关( )
A.
最常见的原因是慢支
B.
吸烟是主要的致病因素
C.
反复感染
D.
肺气肿发生与人体α 1 抗胰蛋白酶增高有关
E.
与大气污染和气候有关
【简答题】Tourism is a booming business in China. However, some people worry that too many tourists may bring harm to the environment, while others dont think so. What is your opinion? Write on ANSWER SHEET THR...
【简答题】若在一个非零无符号二进制整数右边加两个零形成一个新的数，则新数的值是原数值的( )。 (A)四倍 (B)二倍 (C)四分之一 (D)二分之一
【简答题】The deaerating heater uses ____1_____ bled from the high-pressure turbine to heat the feed-water to _______2________ temperature. The water is mechanically agitated to enhance the release process. The...
【单选题】The heat removed from the refrigerant in the condenser of a refrigeration plant is the （）
A.
latent heat of expansion
B.
sensible heat of condensation
C.
heat of compression
D.
all of the above
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