溶原性转换
参考答案:
温和噬菌体的DNA整合到宿主菌的染色体DNA后,使细菌的基因型发生改变从而获得新的遗传性状
任务型阅读
Before you start your day, the following lifestyle habits are good for you.
Music can make you relaxed and is good for your health. Listening to music before work will bring you a relaxing day. 1
The hot water shower (淋浴) will make it easier for you to get a good stretch (伸展). The stretch will make you start the day feeling more relaxed. 2
Breakfast is known as "the most important meal of the day". A balanced (均衡的) breakfast is important for every one of us. Be sure to have some milk and fruit. 3
A morning walk can let you get ready for the day, help you sleep better at night and so on. 4 .
请为上面四个小文段选择合适的小标题
A. balanced breakfast
B. A morning walk
C. Stretch in the shower
D. Listen to some music
5. What's the main (主要的) idea of this article?
A. What are lifestyle habits
B. What to eat before your work
C. Four great ways to start your day
D. How to make yourself relaxed
尿潴留是由于( )的原因导致的。
A.老年人内分泌功能衰退
B.老年人泌尿系统功能衰退
C.老年人喝水过少
D.老年人喝水过多