题型:问答题 根据下列装置回答问题(1)写出图中标有字母的仪器的名称:a______b______.(2)装置B可用于实验制备______气体和______气体.(3)实验室制取并收集氧气,应选用装置______和装置______或______填写装置序号),制取氧气的化学方程式为______. 查看答案
题型:问答题 With your help, there is no doubt ______ our plan is meant for will work out successfully. [ ]A. that what B. whether that C. what that D. that which 查看答案