题目

我省某市中考化学实验操作考试有四个考题：①粗盐提纯②酸的化学性质③二氧化碳的制取、收集和验满④氧气的制取、收集和验满。考试的方法是由考生抽签确定考题，小凯同学抽签后被监考老师引导至准备了下列仪器和药品的实验台前：   请回答： ⑴指出上图中仪器a的名称              。 ⑵由实验台上提供的仪器和药品，你认为小凯抽到的是第        个考题； ⑶以下是小凯完成该实验主要操作过程的示意图。按评分标准，每项操根据对话内容，从对话后的选项中选出能填入空白处的最佳选项，并将答案标号填写在答题卡上相应题号后的横线上。选项中有两项多余选项。        A：Frank，it’s almost vacation time．Have you found a summer j ob yet?        B：  51    But camp job doesn’t pay much．How about you?        A：Well，I think I can get a j ob at the Friendship Hotel．A friend of mine was a waiter there last summer．The pay wasn’t good，but he got a lot of tips．He was happy with it．        B：  52   She enjoyed it．She said a restaurant was a good place for her．        A：53 After sitting in school classes all winter，I'd like a job in open air．        B：You are right．Everybody knows high school kids earn a lot just by cutting grass every summer．My brother is only fifteen，but he gets eight dollars every time he cuts somebody’s grass．It takes him only an hour!        A：54 But now，I think I might work for a building company，or something like that．        B：55 You can learn a 10t．        A：Well，I'd like to have a try． 51.          .52.          .53.          .54.          .55.          . 第Ⅱ卷（非选择题，共60分）