问题 单项选择题

以原发性DNA损伤为检测终点的致突变试验是

A.UDS试验

B.Ames试验

C.基因正向突变试验

D.微核试验

E.染色体畸变试验

答案

参考答案:A

阅读理解

阅读短文内容和下面每个人的情况, 为他们选择各自合适的学校类别, 填写在横线上.

    Children's education is very important in England. Children begin with primary education at the age of

five, and this usually lasts until they are eleven. Then  they move to  middle schools. They stay there  until

they reach sixteen, seventeen or eighteen years old. After that, they can have higher education.

    The main kinds of school are: 

State Schools (公立学校)

    Parents don't need to pay for their children's schooling. 

Private Schools (私立学校)

    Parents pay for their children's education.

Primary Schools

    In the UK, primary schools are always close to children's houses. Children stay with the same group

throughout the day.

Middle Schools

    Most children go to the middle school nearest to their houses at the age of 11.

Public Schools (Private Schools)

    A public school is also called a private school. The most famous public schools are Eton, Harrow and

 Winchester. 7% of the children in England go to private schools. Parents pay for their children to go to

these schools.

Prep Schools

    A prep school is a school to prepare pupils to go to a public school. They are for kids between seven

and eleven or thirteen years old.

1. Steven is 12 years old. He wants to be a student in Eton School. _____________

2. Susan is 11 years old. She wants to go to the school nearest to her home.  ___________

3. John is 13 years old and his father is very poor. _____________

4. Lily is 5 years old. She lives with her mother, and her mother is very poor. ____________

5. Jack is 9 years old. He wants to pass the exam and go to a private school. ____________

判断题