问题 单项选择题

用培养液培养三种细菌,让它们在三个不同的试管中生长,下图显示了细菌的生长层。如果此时往三支试管中通入氧气,则细菌的繁殖速度可能发生的变化是()

A.A选项

B.B选项

C.C选项

D.D选项

答案

参考答案:B

解析:本题考查细胞呼吸类型的判断以及氧气对呼吸类型的影响。图形分析:第一种是厌氧细菌,第二种是兼性细菌,第三种是好氧细菌。后两种有氧气的时候生长加快,第一种有氧气的时候生长受到抑制。答案选B。考点:细胞呼吸类型的判断以及区别。点评:以图形作为信息的载体,考查了细胞呼吸的相关知识,提升了学生分析图形,以及解决问题的能力。

完形填空

阅读下面短文并回答问题,然后将答案写在第二卷对应的横线上(请注意问题后的词数要求)

【1】If you are worried about things and are under a lot of stress at work or school, then you are probably not sleeping well. Worry can keep you awake, tossing and turning in bed until the early hours of the morning when you eventually fail asleep. When you wake up, you don't feel refreshed, but tired and worn out and unable to face a new day.

【2】Dr Henry Winkle wrote an article in a recent newspaper, which indicates that          . Dr Winkle says, “The more we worry, the less we sleep, the more we are unable to deal with stress. If we can find a way to get a good night's sleep,” he adds, “we can often find the energy to deal with what's worrying us.”

【3】So, what is a good night's sleep? Research shows that the amount of sleep which people need in order to keep healthy varies a lot. Seven hours in about the average amount, though strangely enough, sleeping longer often gives you a headache instead of making you feel more refreshed.

【4】Dr Winkle believes that preparing for sleeping is important. People who work late should try to give themselves a short break and do something restful before going to bed. This could be watching TV or listening to music. Doing some exercise earlier in the day should help you to feel physically as well as mentally tired. A bedtime drink can also help, but coffee or tea should be avoided as they contain caffeine and will keep you awake. “When you put the light out,” Dr Winkle says, “ concentrate on relaxing your muscles, working slowly up from your feet, and you'll be asleep before you know it.”

小题1:What is the best title of the text? (no more than 10 words)

                                                                     

小题2:Which sentence in the text can be replaced by the following one?

People shouldn't go to sleep immediately but should take a break after working late in the night.

                                                                     

小题3:Please fill in the blank in Paragraph 2 with proper words or phrase to complete the sentence. (no more than 10 words)

                                                                     

小题4:Someone says that the longer you sleep, the better you feel. Try to find some arguments from the text against the idea. (no more than 30 words)

                                                                 

小题5:Translate the underlined sentence in Paragraph 1 into Chinese.

                                                             

填空题