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【单选题】
有关船舶中为什么要使用中压电力系统的叙述,下列叙述不正确的是 。A.
低压电气设备的造价低,防止人身触电的安全性比中压电力系统
B.
在低压系统中,如果电动机的功率很大,则电流值会很大,绕组的截面积也会很大,但是从工艺角度无法制作;而采用中压系统则可以大大减小绕组的截面积
C.
在低压系统中,极大的线路传输电流会使线路的功率损耗很大,而采用中压系统则可以大大降低线路电流
D.
在低压系统中,发生短路时产生巨大的短路电流,使与之相配的导线和断路器等设备的设计制作变得难以实现
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【简答题】The Blacks are American tourists. They are visiting Beijing now. This is their first visit to China. They are going to stay in China for three months. They want to visit some big cities and villages ....
【单选题】温病其人昏谵躁扰,妄为如狂,少腹硬满疼痛,大便色黑,舌质紫暗,其昏谵机理为:( )
A.
A ．热陷包络，扰乱神明
B.
B．瘀热扰心
C.
Ｃ．湿热酿痰，蒙蔽包络，扰及心神
D.
Ｄ．热结肠腑，胃热扰心
【简答题】阅读理解。 The Blacks are American tourists. They visits now in Beijing. This is their first visit to China. They are going to stay in China for three months. They want to visit some big cities and village...
【简答题】阅读理解。 The Blacks are American tourists. They are visiting Beijing. This is their first visit to China. They are going to stay in China for three months. They want to visit some big cities and villages...
【单选题】In the early time of 20th century,______
A.
American blacks wrote the first blues song
B.
Handy composed the song 'Dallas Blues'
C.
the blues became popular in U.S.
D.
Instrumental blues appeared
【单选题】The first blacks were brought to North America as .
A.
servants
B.
slaves
C.
farmers
D.
teachers
【单选题】患者，女，41岁，患乳癌准备行乳癌根治性手术，术前患者最关心的健康宣教内容是
A.
手术方式和手术效果
B.
术后疼痛和不适的处理
C.
手术室的环境和设备
D.
术前备皮、用药的重要性
E.
术后上肢功能锻炼的方法
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