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问题 单项选择题 A1/A2型题

细菌缺乏下列结构在一定条件下仍可存活的是（）

A.核质

B.细胞膜

C.细胞质

D.细胞壁

E.以上均可

答案

参考答案：D

解析：细胞壁缺损的细菌在高渗环境下多数可以存活，即所谓"L型细菌"。

改错题
单句改错 (每个句子只有一处错误,每处错误只改动一个词。)
1. It was last week we sold our car to a Mexican. ______
2. Who was it first thought of such a crazy idea? ______
3. All of us persuaded him to go by air, but he wouldn't listen. ______
4. We managed to get the work done on time, but failed. ______
5. They insisted that all the work was finished as soon as possible. ______
6. Lily was seen go to the supermarket this morning. ______
7. There is only one copy of it left in the bookstore; go and buy one quickly. ______
8. His sister has one serious shortcoming. She must be really stubborn sometimes. ______
9. Going down the hills was a great fun especially as it gradually became warmer. ______
10. Along the way children dressing in long wool coats stopped to look at us. ______
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单项选择题

霍乱的预防是（）

A.加强疫情检测，做好疫情情报

B.确保安全供水，搞好环境卫生

C.加强食品卫生管理

D.B+C

E.A+B+C
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