问题
单项选择题 A1/A2型题
红霉素主要作用于细菌的（）
A.核酸
B.DNA螺旋酶
C.叶酸
D.30S核糖体亚单位
E.50S核糖体亚单位
答案
参考答案：E
搜题请搜索小程序“爱下问搜题”
红霉素主要作用于细菌的（）
A.核酸
B.DNA螺旋酶
C.叶酸
D.30S核糖体亚单位
E.50S核糖体亚单位
参考答案：E
| 完形填空。 | |||
| Jane is a nice girl and she likes small animals. On her way back from school __1__afternoon, she always stops__2__ the animals in the pet(宠物)shop. She likes to see the dogs. One of them is a little white dog,and Jane likes it__3__.She__4__the dog __5__ in the pet shop. She often forgets(忘记)the time. So she comes home very__6__. One day her parents asked 7__she was late. Jane told them about the dog in the pet shop. The next day Jane stopped to look __8 _ the window of the pet shop,but she could not__9 _the dog. She was very sad and went home early. When she _ 10__home,her mother showed her a big cake and her father gave her the little white dog from the pet shop. It was her birthday. Jane was very glad. From that day, she did not come home late. She ran home early to play with the little white dog every day. | |||
| ( )1. A. each one ( )2. A. looking at ( )3. A. very many ( )4. A. watches ( )5. A. to play ( )6. A. late ( )7. A. what ( )8. A. at ( )9. A. looked ( )10. A. got | B. every B. looks at B. very much B. watch B. play B. early B. why B. to B. looked at B. got to | C. this C. to look at C. very C. see C. played C. fast C. when C. into C. saw C. arrived in | D. ／ D. looked at D. 1itde D. saw D. plays D. first D. where D. onto D. see D. arrived at |