在特异性免疫中发挥免疫作用的主要细胞是A．骨髓干细胞  B．A细胞  C．抗原  D

阅读理解。

     Two farmers were on their way home one evening after a hard day's work.  Bothwere tired. They

happened to look up at the sky and saw a black cloud over head.

     "Ah!" said one farmer,  "Tomorrow we shall have rain and the rice will grow well. "The second

answered,  "Nonsense (胡说),  the rain will only kill the crops. " So theybegan to quarrel. Just then

a third farmer came along and asked them why they werequarrelling. Both farmers explained about

the black cloud.  "What cloud?" asked thethird farmer.  They all looked at the sky.  The cloud was

no longer there.

1. The two farmers were_____ .

A.going home

B.going to the field.

C.going to work

2.The two farmers_____on that day.

A. had a holiday

B. didn't work

C. worked hard

3.The two farmers fought in words because _____.

A. they were hungry

B. they both hoped for rain

C. one said the rain would do good to the crops and the other didn't

think so.

4.The third farmer came with and said to the other two. He_____

A.wanted to make friends with them

B.joined them in the quarrel

C.wanted to know why they were quarrelling

5.How many farmers said that the rain would be helpful?

A. None.

B. One.

C. Two.

我国的三大平原，由北向南依次是（　　）

A．东北平原--河套平原--宁夏平原

B．江汉平原--鄱阳湖平原--太湖平原

C．东北平原--华北平原--长江中下游平原

D．珠江三角洲--长江三角洲--华北平原

维生素A是所有具有视黄醇生物活动的α─紫罗宁衍生物的统称。

28岁孕妇，停经2个月， * * 少量流血。查体：一般情况好，脉搏82次/分，血压120/80mmHg。妇科检查：宫口闭，子宫2个月妊娠大小，双附件阴性。尿妊娠试验(+)。正确的处理方法为()

A．后宫窿穿刺术

B．保胎治疗

C．肌注缩宫素引产

D．输血

E．立即刮宫术

阅读理解.

     Every family with kids has seen its share of arguments,shouting and complaining.It turns

out that all that conflict serves an important purpose in the development of children.Saying

"no",followed by a temper tantrums (发脾气),just may be an unavoidable part of growing

up.And that's a good thing.These are the first steps toward independence.Even young children

have to challenge their parents sometimes.

     Studies have shown the following:

     Although stressful,conflict is beneficial for children.

     Learning to manage conflict is necessary for a child's development.

     Conflicts during the preschool years occur because children desire even more attention

than parents can or should give.

     If you understand why conflict occurs,it can minimize (最小化) the conflicts between

you and your children.Conflict is a child's attempt to develop a sense of self and how he or

she learns to express needs and ideas.Parents develop and drive this independence by

exposing children to the outside world both formally and informally.

     Conflict can grow out of a difference of opinion or might just be a way to blow off steam

(发泄怒气)．In rare situations,constant conflict between a parent and child can indicate a

deeper emotional problem.Consult your doctor if this seems to be your situation.

     It's important to offer your child choices,which should be determined by age and

developmental level.The more responsible a child is,the more choices he or she gets in reward.

You can threaten your child with punishment,but often offering a choice will better improve

angry situations.Consequences and rewards should have some meaning to your child.

     Often a child's adverse (敌对的) reaction when he or she hears the word "no" can be

avoided by giving the child an explanation as to why you have refused their request.

1．What would be the best title for the passage?_____

A．Children's temper tantrums

B．Saying "no" is part of growing up

C．How to deal with children

D．Relationship between parents and children

2．Why does the author say "that's a good thing"in Paragraph 1?_____

A．Conflicts benefit parents a lot.

B．That means children want to be independent.

C．The conflict between parents and children is a must.

D．Conflicts are useful for children's physical development.

3．According to the passage,conflicts can occur when________.

A．parents try to control their children

B．children refuse to express needs and ideas

C．children are exposed to the outside world

D．parents and children have different ideas

4．According to the passage,which of the following is useful for reducing conflicts between

parents and children?_____

A．Avoiding saying "no" to children directly.

B．Respecting children's choices completely.

C．Punishing children if necessary.

D．Seeing a doctor frequently.

5．The passage is mainly written for________.

A．teachers

B．children

C．parents

D．experts