请简要叙述“关云长刮骨疗毒”的情节。（75回）

阅读理解。

     Liu Mei has a happy family.She lives with her grandparents and parents in Zhenjiang.

     Her father is a doctor.He goes to work on foot every day.He is not very tall,but he is very strong.Her mother is a

teacher.She goes to work by car.She loves her students.Liu Mei's grandparents stay at home.In the morning,  they

go to the park.In the afternoon,they drink tea with their friends.In the evening,they watch TV and read newspapers.

      Liu Mei is a student in No.1 Middle School.Her school is very beautiful.There are many tall buildings there. She

likes studying at this school.

     Liu Mei loves her family very much.

1.What do Liu Mei's parents do?

A.A doctor and a worker          

B.A nurse and a teacher      

C.A doctor and a teacher          

D.A teacher and a worker

2.How does Liu Mei's mother go to work?

A.On foot        

B.By bike        

C.By bus        

D.By car

3.What do Liu Mei's grandparents NOT do every day?

A.Watch TV and read newspapers.        

B.Drink tea with their friends

C .Go to the park.                      

D.Go to work.

4.Which is true according to the passage?

A.Liu Mei lives with her grandparents in Nanjing.

B.Liu Mei's father often goes to work by car.

C.Liu Mei is a student in No.1 Middle School.

D.Liu Mei doesn't like studying at her school.

5.What is the title(题目)of the passage?

A.Liu Mei's Grandparents            

B.Liu Mei's Hobbies

C.Liu Mei's Family                  

D.Liu Mei's School

一辆汽车正以15m/s的速度在平直的公路上行驶，突然，司机发现正前方15m处有一辆自行车以5m/s的速度做同方向的运动，在反应0.4s后才实施制动（这个时间称为反应时间）.若汽车刹车时能产生的最大加速度为5m/s²，请问汽车是否会撞上自行车？若不相撞，求两车相距最近时的距离；若相撞，求汽车刹车后经多长时间与自行车相撞。

医药专利的授权部门是（）

A.县级以上人民政府负责中医药管理的部门

B.区级以上人民政府负责中医药管理的部门

C.省级以上人民政府负责中医药管理的部门

D.国家中医药管理的部门

E.国家知识产权局

工作是否必要和可能及是否按规定进行危险点分析工作是工作班成员应负的安全责任。

什么情况下汽车水箱易开锅？