问题
选择题
下列各种材料的容器，不能用来装运浓HNO3或浓H2SO4的是（ ）
A．铜
B．铁
C．陶瓷
D．铝
答案
答案：A
铁和铝常温下在浓HNO3或浓H2SO4中钝化，可以贮存它们，陶瓷不与之反应，只有Cu与这两种浓酸反应，所以只有A项符合题意。
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下列各种材料的容器，不能用来装运浓HNO3或浓H2SO4的是（ ）
A．铜
B．铁
C．陶瓷
D．铝
答案：A
铁和铝常温下在浓HNO3或浓H2SO4中钝化，可以贮存它们，陶瓷不与之反应，只有Cu与这两种浓酸反应，所以只有A项符合题意。
| 情景对话，选用方框中的句子完成对话，其中有两项是多余的。 | |
| Li Lei: Excuse me. 1 Mr. Smith: Yes. And you are.. . ? Li Lei: I'm Li Lei. Your friend Miss Wu is busy at the moment. She asks me to meet you.Welcome to Hangzhou, Mr. Smith. Mr. Smith: Thank you. Li Lei: By the way, 2 Mr. Smith: No. This is my second time. I came here in 1998 for the first time. Li Lei: 3 Mr. Smith: I like it very much. It' s very beautiful and famous in the world. And the people here are quite friendly. 4 Li Lei: I'm glad you like the city. And now Hangzhou is becoming more and more beautiful. 5 Mr. Smith: I think so. Thank you very much for meeting me. Li Lei: It's a pleasure. | |
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