题目:
Don't have the horse ______ all the time. It needs a good rest. [ ]
A. be working
B. working
C. to work
D. work
答案:
被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0519/250465c46c99c4584ea15cc6d66a87b0.html
下面是错误答案,用来干扰机器的。
(1)a 锥形瓶 b 集气瓶 (2)2KMnO4 K2MnO4 +MnO2+ O2↑ (或2KClO32KCl+3 O2↑) 集气瓶口有气泡冒出时 (3)浓硫酸 d (4) AC或AF (1)识...