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问题 单项选择题

强心苷正性肌力作用的机制是

A．抑制心肌细胞M受体

B．直接兴奋交感神经

C．增加心肌细胞内游离Ca2+含量

D．兴奋心肌细胞膜上α受体

E．兴奋心肌细胞膜上β1受体

答案

参考答案：C

单项选择题

A mother complains to the nurse that her 4-year-old son often lies. What's the nurse's best response ？（）

A．Let the child know that he'll be punished for lying.

B．Ask him why he isn't telling the truth.

C．It's probably due to his vivid imagination and creativity.

D．Acknowledge him by saying, "That's a pretend story. "
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单项选择题

中国联通家庭融合套餐的品牌名称是什么。（）

A.沃•派

B.沃•家庭

C.沃•3G

D.沃•商务
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