HBV处于复制状态，有传染性的标志是（）。注射乙肝疫苗后阳性的标志是（）。 A.抗-

阅读理解。

     Mr.Ma, a famous mental doctor from Beijing once said at an important meeting, "Now many young

students can have problems with their minds. Some students become worried because they have to study

very hard. Others have trouble getting on well with people around them like their parents and classmates.

Parents and teachers should care more about this problem."

     Then Mr.Ma gave some examples. One patient, a middle school student from Xi'an was doing badly

in his lessons. He thought his teachers and friends often laughed at him, and he became so nervous and

worried that one night he left his homes without telling parents. Another student, a 14-year-old schoolgirl

from Shanghai, was very afraid of exams. While she was reading the exam paper, she couldn't think of

anything to write.

     A recent report from Jiefang Daily says about 18% of the young students in Shanghai have mental

problems. They often fell worried and very unhappy. Unluckily many of them won't go and ask for help.

Some think they will look stupid if they go to see a doctor. Others won't talk about their secrets. At the

end of the meeting, Mr.Ma offered some good ideas to young people.

Talk to your parents or teacher often.

Take part in group activities.

Try to get on well with the people around you.

Go to see a doctor if you often feel unhappy.

1. The students who often become worried or have trouble getting on with others may have ________.

A. no parents         

B. no secrets

C. poor memories      

D. mental problems

2. The schoolgirl's problem happened whenever she ________.

A. studied very hard    

B. had exams

C. talked with her parents  

D. went to see the doctor

3. Some of those with mental problems won't ask for help because ________.

A. they don't want  to tell their secrets to others

B. their parents are too busy to look after them

C. doctors can't help them with the problems

D. they can do with the problems themselves

4. The underlined word "stupid" in this passage means ________.

A. pretty  

B. happy

C. not clever

D. not friendly

5. According to the last part, which of the followings is a good idea?

A. It's important for children to live with their parents.

B. It's helpful for people to see doctors every day.

C. It's useful for students to keep quiet in class.

D. It's necessary for young people to have group activities.

若（x²+ax+5）（x³+2x+3）的展开式中不含x²的项，则a的值为（    ）．

男性，65岁。冠心病心绞痛史8年，无高血压史，夜间突发心前区疼痛8小时入院。入院时血压为150/90mmHg，经心电图检查，诊断为急性前壁心肌梗死。

最可能的心电图表现为（）

A.Ⅱ、Ⅲ、aVF出现异常Q波，伴ST段弓背向上抬高

B.V₁～V₄出现异常Q波，伴ST段弓背向上抬高

C.V₁～V₄出现冠状T波

D.Ⅲ度房室传导阻滞

E.频发室性期前收缩

根据下列表，完成下面问题

调查中，2006年“生产总值”指数持平企业数量约为“产品订货形势”指数增加企业数量的( )。

A．3.2倍

B．4.1倍

C．4.7倍

D．5.2倍

下列说法正确的是( )

A．人身保险和财产保险都完全适用损失填补原则
B．财产保险合同适用损失填补原则
C．财产保险合同和人身保险合同中都有保险价值的概念
D．人身保险和财产保险的保险费都可以诉讼的方式追缴