Jane misses her brother very much and she is looking forward ____ him. A. to hear from B. hearing from C. to hearing from 答案:C(7分)化学实验室老师给学生准备了几组实验装置。(1)写出标号所指仪器的名称①__________,②_____________;(2)写出实验室利用A装置不用催化剂制备氧气的化学方程式;_____________;(3)在B装置中,长颈漏斗的作用是________________________;(4)实验室收集一瓶二氧化碳碳气体常用的收集方法为上述装置中的______,检验是否收集满的方法是__________________________________。