椎管内麻醉术前用阿托品的目的是()
A.预防呕吐
B.减少胃肠道腺体分泌
C.减弱迷走神经反射
D.提高痛阈,减少麻醉药用量
E.镇静催眠
参考答案:C
--- Look! Everything here is under construction.
--- What’s the pretty small house that _______ for?
A.is building
B.is being built
C.is built
D.had been built
一瓶水倒掉一部分,则剩余部分的水的质量______,体积______,密度______.(填“变大”或“变小”或“不变”)