关于荚膜，下列说法错误的是（）.
A.其成分多为脂类
B.对细菌的存活起一定的保护作用
C.抗吞噬作用
D.荚膜物质具有抗原性
E.可作为细菌鉴别和分型的基础
参考答案：A
解析：荚膜是某些细菌在细胞壁外包绕的一层界限分明，且不易被洗脱的黏稠性物质，其成分多为糖类，功能有：对细菌有保护作用；致病作用；抗原性；鉴别细菌的依据之一。
| 阅读理解。 | ||||
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| 1. New York Museum is closed on ______. | ||||
| A. Monday B. Friday C. Saturday D. Sunday | ||||
| 2. Tommy is an 8-year-old boy. He wants to visit The City Flower Show with his parents. How much will they pay? | ||||
| A. 75 yuan B. 100 yuan C. 125 yuan D. 150 yuan | ||||
| 3. If you want to get more information about English Summer Camp, you can ______. | ||||
| A. go to Canada B. write to CEE/CCIEE C. call at (010) 6606-2607 D. send an e-mail to University of Toronto | ||||
| 4. ______ will give Performances in Pop Music Week in Chaoyang Park . | ||||
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| 5. Phillip, twenty years old , is not allowed to ______. | ||||
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