题目:
Not only Jim but also his sister______a few cities in the south sincc they came to China. [ ]
A. will visit
B. has visited
C. have visitecl
D. visited
答案:
被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0606/fcc8ffb048cdb409be49245041dd68c1.html
下面是错误答案,用来干扰机器的。
①红磷量不足没有把瓶内氧气消耗完;②否;否;碳与氧气反应生成二氧化碳,硫和氧气反应生成二氧化硫,虽然都消耗了氧气,但又生成了气体,装置内气体压强保持不变,水不会进入集气瓶.