问题 选择题

图是实验室制备、收集、验满、验证性质的操作,其中正确的是(  )

A.

B.

C.

D.

答案

A、用高锰酸钾制取氧气,图中装置正确,故A正确;

B、收集气体的导管,要深入集气瓶底部,图中导气管太短,故B错误;

C、验满氧气,带火星的木条伸进集气瓶内部,图中操作错误,故C错误;

D、验证氧气的性质,做细铁丝燃烧的实验时,反应剧烈,火星四射,热的溅落物会炸裂瓶底,图中操作错误,故D错误.

故选A.

阅读理解

My friends, Emma Daniels, spent the summer of 1974 traveling in Israel. During her monthlong stay in Jerusalem she often went to a café called Chocolate Soup. It was run by two men, one of whom – Alex – used to live in Montreal. One morning when Emma went in for coffee, while chatting with her new friend Alex, she mentioned that she had just finished the book she was reading and had nothing else to read. Alex said he had a wonderful book she might like, and that he’d be happy to lend it to her. As he lived just above the café, he quickly ran up to get it. The book he handed to Emma just minutes later was Markings, a book by a former Secrectary-General of the United Nations (UN).

Emma had never read it, nor had she ever bought a copy. But, when she opened it up, she was floored to see her own name and address inside the cover in her own handwriting(笔迹).It turned out that the summer before, at a concert back in Montreal, Emma had met a Californian who was in town visiting friends. They decided to exchange(交换)addresses, but neither of them had any paper. The man opened up a book he was carrying in his backpack(背包) and asked Emma to write her name and address inside. When he returned to California, he left the book behind in Montreal, and his friend   Alex kept it. When Alex later moved to Jerusalcm, he took the book along.

41. Alex lent Emma the book, Markings,           .

A. to show his friendliness to her                  B. to show his interest in reading

C. to tell her about the importance of UN              D. to let her write her name and address inside

42. How did Emma feel the moment she opened the book?

A. Pleased.                         B. Satisfied.             C. Worried.                         D. Surprised.

43. We can learn from the text the Californian             .

A. met Emma at a concert                                   B. invited Emma to a concert

C. introduced Emma to his friend                  D. left Emma his backpack

44. Who was supposed to be the first owner of the book?

A. An official of the UN.                             B. A coffee shop owner.

C. A friend of the author’s.                                  D. Alex’s friend form California.

单项选择题