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【单选题】
预防长期卧床病人肌肉挛缩的护理措施是
A.
定时更换体位
B.
肢体被动运动
C.
温水拭浴
D.
局部热敷
E.
应用支被架,防止局部受压
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【单选题】乙类互补对称功放提供的电源为Vcc、-Vcc,负载RL上允许输出的最大不失真功率Pomax= 。
A.
VccVcc/RL
B.
VccVcc/2RL
C.
VccVcc/4RL
【单选题】某元素的原子核外有 3 个电子层,最外层有 5 个电 子,该原子核内的质子数为( )
A.
14
B.
15
C.
16
D.
17
【单选题】The world's first test-tube baby was ______________ who was born in Britain in 1978.
A.
Louise Brown
B.
Louise Paxton
C.
Lucy Brown
D.
Lilly Brown
【单选题】下列可引起混合性呼吸困难的是()
A.
气管异物
B.
白喉
C.
大面积肺梗死
D.
支气管哮喘
E.
慢性阻塞性肺气肿
【单选题】The first test-tube baby of China was born in Beijing on March 10, _______.
A.
1980
B.
1985
C.
1988
D.
1998
【单选题】某元素的原子核外有3个电子层,最外层有7个电子,该原子核内的质子数为
A.
14
B.
15
C.
16
D.
17
【单选题】某元素的原子核外有3个电子层,最外层有7个电子,其核内的质子数为
A.
14
B.
15
C.
16
D.
17
【单选题】The Art Director starts the meeting by remembering the type of monitor she used when she first started in the business. Her first display device was a CRT monitor that used a ____ ray tube.
A.
television
B.
candela
C.
cathode
D.
crystal
【单选题】花生四烯酸是
A.
十八碳三烯酸
B.
十八碳二烯酸
C.
二十二碳六烯酸
D.
二十碳四烯酸
【单选题】The tube was first built in the ____ of London.
A.
centre and north
B.
east and north
C.
west and south
D.
centre and south
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