在①试管；②量筒；③蒸发皿；④锥形瓶中，能盛装碳酸氢铵固体在酒精灯上直接加热的仪器有（ ）
A．①②
B．①③
C．①④
D．只有①
答案：B
新的高变催化剂在投入正常运行时不需要进行放硫。（）
_____ they known their neighbor was a drummer, they _____ into the building. [ ]
A. Had; wouldn't have moved
B. Were; wouldn't move
C. Had; wouldn't move
D. If had; wouldn't have moved
