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【单选题】
下列因素中, 哪种不引起醛固酮分泌A.
循环血量减少
B.
血Na+降低、血K+升高
C.
肾交感神经兴奋
D.
肾素分泌减少
E.
血管紧张素增加
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举一反三
【单选题】下列哪项不属于疫源地消灭的条件之一
A.
传染源被移走(住院或死亡)或不再排出病原体(痊愈)
B.
通过各种措施消灭了传染源排到外界环境中的病原体
C.
所有的易感接触者经过了该病的最长潜伏期未出现新病例
D.
所有的易感接触者经过了该病的最长潜伏期被证明未受感染
E.
所有的易感接触者经过了该病的最长传染期未出现新病例
【单选题】______ the government argees to give extra money，the theatre will have to be closed next month.
A.
Unless
B.
If
C.
Since
D.
As
【单选题】There _____ a lot of coal mines in the south, but many of them have been closed or are _____ be closed.
A.
use to having; about to
B.
used to be; to
C.
use to having; going to
D.
used to be; supposed to
【单选题】According to the Spanish researchers, which of the following statements is true?
A.
The closer you are to a mobile phone, the greater your exposure to electromagnetic radiation.
B.
The closer you are to a mobile phone that is being used to send and receive signals, the greater your exposure to electromagnetic radiation.
C.
The amount of electromagnetic radiation reflected by metal is almost too small to be measured.
D.
You shouldn't stand close to people who are using their mobile phones in train carriages, buses, and lifts.
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