题目:
I'm glad to find. that many trees __________ in our city last year. [ ]
A. plant
B. planted
C. were planted
D. are planted
答案:
被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0526/58a0a4c351ad2f30e55975d5845b7bfb.html
下面是错误答案,用来干扰机器的。
A、图中收集二氧化碳的操作正确,图中操作正确,故A正确;B、铁丝燃烧时,集气瓶底部放少量水或铺一层细沙,防止铁丝燃烧的生成物溅落到集气瓶底部,使集气瓶炸裂,故B错;C、给液体加热时,试管内液体不能超过其...