题型：填空题 用方框中所给词的适当形式填空，其中有两项是多余的。service, popular, survey, good, delicious, think, what, and, play, friendly, heavy, do What do students 1 about fast-food restaurants in our city? We did a 2 of the students in our school last week and this is 3 we learned. Most of the students think all fast-food restaurants are good,and the KFC is the 4 in our city. It has the most creative food and the best 5 . However, McDonald's is the cheapest 6 it has the funniest pictures. It also 7 the most interesting music. The most 8 restaurant is the Pizza Hut. It has the most 9 food and the 10 service.1._______ 2._______ 3._______ 4._______ 5._______6._______ 7._______ 8._______ 9._______ 10._______ 查看答案
题型：计算题 硫化氢(H2S)是一种具有臭鸡蛋气味的致命毒气，它的密度比空气大，可溶于水形成氢硫酸，氢硫酸具有酸的通性。实验室常用固体硫化亚铁(FeS)和稀硫酸在常温下制得H2S，同时生成FeSO4。 （1）在上图中，应选用图 作为制取H2S的装置。（2）收集H2S气体时，应从C装置中的 导管进入，对产生尾气的处理方法是： 。（3）实验室若制取6.8克的硫化氢气体，理论上需要多少克20%的硫酸溶液？ 查看答案
