题目

  请认真阅读下面短文，从短文后各题所给的A、B、C、D四个选项中，选出最佳选项，并在答题卡上将该项涂黑。 Four brothers left home for college, and they became successful doctors and lawyers. Some years later, they   36   after having dinner together. They discussed the   37   they gave their elderly mother who lived far away in another city. The first said, “I had a   38   house built for Mama.” The second said, “I had my Mercedes-Benz dealer（经销商）send a   39   to her.” The third said, “I built a beautiful   40  如图所示为实验室常用的实验装置：据此回答下列问题：（1）写出带标号仪器的名称：①________②________（2）实验室制取二氧化碳选用的发生和收集装置是________，写出实验室制取二氧化碳的化学方程式________．用该装置在实验室还能制取其他气体，请写出一个相应的化学方程式是________．（3）F装置可用来测量生成二氧化碳的体积，其中在水面上放一层植物油的目的是________，植物油上方原有的空气对实验的结果________（填“有”或“没有”）明显影响．（4）若实验室用高锰酸钾制取纯净的氧气，则选用的收集装置是________，用此收集方法证明氧气已满的现象是________．该反应的化学方程式是________．