分子内或分子间发生的遗传信息的重新共价组合过程是()
A.DN修饰
B.DN复性
C.DN变性
D.DN重组
E.DN损伤
参考答案:D
阅读理解,选择合适的答案。
Winter is very cold. Sometimes it snows in winter. We can play with the snow. We can make snowmen.
We usually wear warm clothes. My favourite season is winter, because my birthday is in December.
1. Winter is ______.
A. cold
B. warm
C. hot
2. Sometimes it ______ in winter.
A. rains
B. snows
C. snow
3. What can we do in winter?
A. We can swim.
B. We can make snowmen.
C. We can plant trees and flowers.
4. We usually wear _______ in winter.
A. shirts
B. shorts
C. warm clothes
5. Which one below is right?
A. I don't like winter.
B. I like to swim in winter.
C. My birthday is in December.
漏电保护继电器具有对漏电流检测和判断的功能,()切断和接通主回路功能的漏电保护装置。
A、不具有
B、具有