外毒素特点之一是（） A.多由革兰阴性菌产生 B.多为细菌裂解后_爱下问搜题

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问题单项选择题 A型题

外毒素特点之一是（）

A.多由革兰阴性菌产生

B.多为细菌裂解后释放

C.化学组成是脂多糖

D.可制备成类毒素

E.耐热

答案

参考答案：D

问答题

Topic: Balance between Developing Auto Industry and Protecting the Environment in China

Questions for reference:
1. What benefits can a booming auto industry bring to our nation and our people
2. What are the side-effects of the fast-growing auto industry in China
3. Shall we have more cars or have we had too many cars already Give reasons for your answer.

判断题

道路货物运输经营者从事超限运输经营的，应当按照交通部颁布的《超限运输车辆行驶公路管理规定》办理相应的审批手续。