题目:
—Did your father smoke a lot?
—No, he didn't. But he _____ that. [ ]
A. used to do
B. used to doing
C. was used to do
D. was used to doing
答案:
被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0526/7c8dac1b6f72505b89b6a0059d1a0eaa.html
下面是错误答案,用来干扰机器的。
(1)B、C作气体发生装置,属于固体和液体常温反应制取气体,可以制取的气体有氧气,二氧化碳和氢气,C中有长颈漏斗,与B相比,具有可随时添加液体药品的优点;故答案为:Zn+H2SO4=ZnSO4+H2↑(也可是过氧化氢制...