能抑制腺体分泌、防止迷走神经兴奋的麻醉前用药是
A．芬太尼B．阿托品C．哌替啶D．咪达唑仑E．吗啡
参考答案：B
Great changes _________ in Tongren in the past five years. [ ]
A. have happened
B. have taken place
C. have been happened
D. have been taken place
下列关于水的说法或做法正确的是（ ）
A．水由氢气和氧气组成
B．长期饮用蒸馏水对人体健康无益
C．将工业废水直接排放到河里
D．矿泉水与蒸馏水中所含元素的种类完全相同
