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问题 选择题

培养细菌或真菌的正确程序是（　　）

A．配制培养基、接种、高温灭菌、恒温培养

B．配制培养基、高温灭菌、接种、恒温培养

C．配制培养基、恒温培养、接种、高温灭菌

D．接种、配制培养基、高温灭菌、恒温培养

答案

培养细菌或真菌，应先配制好培养基，并对培养基及其培养皿等材料用具进行高温灭菌；待培养基冷却后，将细菌或真菌接种在培养基表面，进行恒温培养．A、C、D三项不符合题意，B项符合题意．

故选B．

填空题

根据短文内容及首字母提示，写出所缺单词，使短文完整、通顺。

     When you’re busy or stressed, don’t forget your hobbies, such as listening to (1) m_____, reading

and playing ball games. If eating makes you feel better, you can go to your favourite restaurant to have

a delicious meal.  

     Parents may not think that it is useful to (2) w_____ TV. However, if you are worried (3) a_____ your English and don’t know how to improve it, why not watch some English TV programmes? If you’re feeling bad about your weight and don’t (4) k_____ what to do, why not go walking or jogging?   Finally, trying

to keep your worries to yourself can make them worse. I like to (5) s_____ my problems with my friends. They always give me useful advice. If you don’t know who to talk to, you can always write to me. You’re never alone.
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问答题 简答题

门机的A、B、C级检保间隔期为多少运行小时？
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