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问题 单项选择题 A1/A2型题

H-O变异属于（）

A.毒力变异

B.菌落变异

C.鞭毛变异

D.菌体形态变异

E.耐药性变异

答案

参考答案：C

解析：任何细菌从有鞭毛变为无鞭毛的现象统称为H-O变异。一些细菌的抗原性变异也与此变异有关。

完形填空

More and more Chinese people go traveling abroad during these years. But not all tourists behave well in the places of interest. Recently, a story about a 15-year-old Chinese tourist has caused a heated discussion online.

【1】The 15-year-old teenager carved 刻 “Ding Jinhao 丁锦昊was here” in Chinese in the 3,500-year-old Luxor Temple卢克索神庙. A Chinese traveler took a photo and shared it on Sina Weibo on May 24.

Many people were angry about what Ding had done and decided to search the Internet for the boy. 【2】他们只花了一天时间就在南京找到了他的有关信息。After that, Ding’s parents quickly said sorry to the media. “We want to say sorry to the Egyptian people and to people who have paid attention to this matter across China,” Ding’s mother said.

Ding’s parents said they should face it and their son had 【3】a learned his lesson.

　　【3】b        to Xinhua, local Egyptians had worked to try and clean the sculpture雕像. 【4】There was some improvement, but the words could not be totally wiped off.

阅读短文，根据其内容，完成下列任务。

任务一：将小题1:处划线的句子译成汉语。

                                                                                       

任务二：将小题2:处划线的句子译成英语。

                                                                                        

任务三：Guess the Chinese meaning of “learn lesson” in 【3】a:                                    

在文中小题3:b处填入一个适当的单词                                                 

任务四：写出文中小题4:处句子的同义句。

                                                                                          

任务五：小题5:在短文中找一个恰当短语作为短文的标题。

                                                                                           
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单项选择题

各缸进气门的微开量比排气门都小，表明进、排气门的配气相位均（）。

A.延迟

B.提前

C.正常
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