毛果芸香碱可用于
A．阿托品中毒的抢救B．琥珀胆碱中毒的抢救C．筒箭毒碱中毒的抢救D．安贝氯铵中毒的抢救E．以上均不是
参考答案：A
It's over _____ from my home to school. It's very near. [ ]
A. ten minutes' walk
B. ten minute's walk
C. ten minutes' walks
D. ten minutes walk
采用泵送混凝土工艺时，水泥用量不宜过少，否则泵送阻力增大，最小水泥用量为（）kg/m，水灰比宜为0.4～0.6。
