属于化学性因素的是（） A．过度吸烟与饮酒 B．残根、残冠和

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问题单项选择题

属于化学性因素的是（）

A．过度吸烟与饮酒

B．残根、残冠和不良修复体

C．EB病毒

D．多种维生素缺乏

E．癌基因被激活或抗癌基因被抑制关于肿瘤的致病因素

答案

参考答案：A

填空题

单词拼写。

根据下列句子及所给汉语注释，写出空缺处各单词的正确形式。（每空只写一词）

1. My _____(本国的)language is Chinese.

2. He went through the forest under the ______(保护)of his dog.

3. There are seven _____ (大洲) on the earth.

4. She is ______(挑剔) about what she eats.

5. The patient was lying on the floor _____(失去知觉).

6. Some fossil ______(燃料)result in increase in carbon dioxide.

7. I was feeling ______ (不舒服) hot.

8. He has gained ______ (实践的) experience of sailing as a sailor.

9. The ten most ______(频繁地) asked questions are listed below.

10. Nowadays we still can see rivers p______ with chemical waste from factories.

选择题

下面的情况，反映了民国时期的服装特点是： [ ]

A、男子全部是长袍马褂，女子以猎装为主

B、男子以西装和中山装为主，女子以旗袍为主

C、女子以连衣裙和列宁装为主

D、绿军装成为流行服装