问题 问答题 简答题

简述芽孢的特性。研究芽孢的意义有哪些?

答案

参考答案:

特性:具有很强的抗热、抗干燥、抗辐射、抗化学药物能力。

含水量低、壁厚而致密,通透性差,不易着色。

新陈代谢几乎停止,处于休眠状态。

一个芽孢萌发产生一个个体。

研究芽孢的意义:分类鉴定;保存菌种;分离菌种;生物杀虫;灭菌标准。

完形填空

根据短文内容,从短文后的选项中选出能填入空白处的最佳选项。选项中的两项为多余选项。

There was a park near my home. But I didn’t go there very often. Many people said there was nothing special. One afternoon I went into the park and found it was really small. I walked quickly because there wasn’t much to see. I walked for some time and found myself standing in front of two paths.小题1: I found that the two paths were different from each other.

The left one was wide and clean. There were lots of flowers on both sides of the path. Though the flowers weren’t very beautiful, they made me feel good. I decided to take this path. But wait! I looked at the right one. The path didn’t look nice.  小题2:  Grass grew everywhere. For a long time I couldn’t make up my mind.

 小题3: It wasn’t nice , but I didn’t want to give up. At last, I came to the end of the path. Ah! There was a small garden there. It was beautiful, perhaps the most beautiful garden I had ever seen. 小题4:  

Many people told me that there was nothing much to see in the park. Now I’d like to tell them that if they had followed the right way, they would have felt differently. But when I told them about what I had seen in the park, they just smiled at me without saying a word. I knew they didn’t believe me. They couldn’t even remember that path because it was so small.

 小题5: Don’t be afraid to choose a different path. You may get a big surprise!

A.There is nothing that I want to see.

B.It looked like it had not been cleaned for months.

C.After a while a strange feeling made me follow the dirty path.

D.“ Which way should I go?” I asked myself. I looked at one way, then the other.E. I told them what happened.

F. My trip to the park that day made me understand something about life.

G. There were trees, flowers and chairs. I thought it was the nicest part of the park.

配伍题 C型题