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问题 单项选择题 A1/A2型题

有关微生物的描述哪项是正确的（）

A.具有致病性的微生物成为病原微生物

B.绝大多数微生物对人类和动、植物是有益的

C.真菌具有核膜和核仁

D.细菌的染色体裸露的环状DNA

E.以上都是

答案

参考答案：E

填空题

根据首字母和汉语提示完成下面句子中的单词

1. He ______(允许)us to read his letter just now.

2. ______(显然) nobody made an apology to him.

3. We admire him for saving the d______(快溺死的)man.

4. People hope children will have fun ______(庆祝) the festivals.

5. They feel ______(自信)they will win the match.

6. He found a wallet, c_______(含有)some money and an identity card.

7. To our _______(宽慰), he was rescued.

8. She was _______(授予)a medal for bravery.

9. People g______ in the hall for the celebration on the eve of the National Day.

10. Why are they in danger of ______(消失)?

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多项选择题

透平抽汽投运时要（）。

A、先设定好抽汽压力

B、机组运行正常

C、先开低压阀阀斜面

D、先关低压阀阀斜面
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