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【单选题】
( )领导了霍桑试验。A.
韦伯
B.
梅奥
C.
伯格
D.
玛丽•福莱特
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举一反三
【简答题】用所给词的适当形式填空 Two cats have eight ________.(foot)
【单选题】下列关于肾上腺素和去甲肾上腺素对心血管调节作用的叙述，错误的是
A.
去甲肾上腺素有强烈的缩血管作用
B.
去甲肾上腺素对心肌的作用比肾上腺素弱
C.
肾上腺素使心率增加，心缩力加强
D.
肾上腺素对总外周阻力影响不大
E.
两者都可引起冠状血管收缩
【简答题】用所给词的适当形式填空。 1. I (go) to zoo with my friend last Sunday. 2. I like (swim) in the river in summer. 3. There (be)a dog and two cats in the room. 4. Which (season) do you like best? 5. Who is the (tall)...
【简答题】用括号内所给词的适当形式填空。 1. Two cats and a dog ________ (be) in the room. 2. —Thank you for ________ (help) us. —That's OK. 3. I would like ________ (stay) at home on Sunday. 4. It takes her about 30 minutes _...
【简答题】用所给词的适当形式填空。 1. I ________ ( watch) videos on my last day off. 2. Did you have fun ________ (drive)? 3. There ________ (be)a bird and two cats in the tree a moment ago. 4. They ________ (buy) many___...
【简答题】根据句意，用括号内所给单词的适当形式填空。 1. Beijing has a lot of fantastic_____(sight). 2. They have many pets,_____(include) three cats and two dogs. 3. My aunt is considering _____ (return) to Beijing to work. 4. I th...
【单选题】下列关于去甲肾上腺素叙述错误的是
A.
是肾上腺素能神经末梢主要合成和释放的神经递质
B.
激动α受体作用强
C.
有弱的激动β2受体的作用
D.
可以升高血压
E.
可导致反射性心率减慢
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