问题 单项选择题

关于性激素哪项是正确的()

A.卵泡外膜细胞是排卵前产生雌激素的主要场所

B.在整个月经周期中,雌激素仅在排卵前出现一次高峰

C.在整个月经周期中,黄体的寿命为10~12天

D.雌激素大部分与特异的β-球蛋白结合

E.雌二醇是雌三醇和雌酮的代谢产物,其雌激素作用最弱

答案

参考答案:D

阅读理解

阅读理解。

     Everyone has worries. How do you deal with your worries? There is always something you can do

to help yourself feel less worried. Sitting there worrying is no fun and it won't solve your problems.

Grades at school are often a top worry for kids. if you worry most about grades, ask yourself these

questions:

    ●Why are grades important? What do grades mean to me?

    ●How do I get ready for class? Do I go over my notes even when there isn't a test?

    ●Do I have a good place to do my homework?

    ●Have I tried different ways of studying?

    If your worry is about a fight you had with your friend, you might write down al! the things you could

do-write a note to him or her, invite him or her to watch a basketball game, say sorry to him or her and

so on. Once you have a list of things you could do, you can choose one thing that could get your friend

back.

     You can ask for help when you're worried. You can find someone to talk to, such as your parents,

friends, and teachers.

1. What do kids often worry most about?

A. Their hobbies.

B. Their homework.

C. Their marks at school.

D. A fight with their friends.

2. According to the passage, when you're worried, you'd better ______.

A. work hard

B. talk to someone

C. get ready for class

D. write down your worries

3. If you're worried about grades, DON'T ask yourself "______".

A. Why are grades important?

B. What do grades mean to me?

C. How do I get ready for class?

D. Why not give up my studies?

4. If you had a fight with a friend, you could _______.

A. invite him or her to watch a game

B. put the blame on him or her

C. try to make new friends

D. leave him or her alone

5. What does the passage mainly tell us?

A. Who is often worried.

B. When people are worried.

C. How to deal with worries.

D. What kinds of worries people have.

填空题