急性肾衰少尿或无尿期常见的致死原因是 A．高磷血症与低钙血症 B．低钠血症 C．低氯

一个物体在水平面上以恒定的加速度运动，它的位移与时间的关系是x=24t-6t²，则它的速度为零的时刻是（　　）

A．

B．6s

C．2s

D．24s

女性，62岁，乳腺癌病史，头颅MR增强检查显示如下图，可能的诊断为（）。

A.脑结核

B.硬脑膜转移

C.软脑膜转移

D.脑膜炎

E.脑膜肉芽肿

柴胡、葛根、升麻都具有的功效是( )

A．生津止渴

B．升举阳气

C．和解少阳

D．疏肝解郁

E．透发麻疹

目前常用的非血缘脐带血选择标准是（）

A.人类白细胞抗原（HLA.-A、B和DRB1血清学配型4～6/6相合

B.HLA-A、B血清学配型，HLA-DRB1基因配型4～6/6相合

C.有核细胞数/受者体重

D.CD34（+）细胞数/受者体重

E.细胞活性

阅读理解。

     Too often young people get themselves employed quite by accident, not knowing what lies in the way

of opportunity for promotion, happiness and security. As a result, they are employed in doing jobs that

afford them little or no satisfaction.

     Our school leavers face so much competition that they seldom care what they do as long as they can

earn a living. Some stay long at a job and learn to like it; others leave one for another looking for something to suit them. The young graduates who leave the university look for jobs that offer a salary up to their

expectation.

     Very few go out into the world knowing exactly what they want and realizing their own abilities. The

reason behind all this confusion is that there never has been a proper vocational (职业的) guidance in our educational institution. Nearly allfeel their way in the dark. Their chief concern when they lookfor a job is

to ask what salary is like. They never bother tothink whether they are suited for the job or, even more

important, whether the job suits them. Having a job is more thanmerely providing yourself and your

dependants (受赡养者) with daily bread and some money for leisure and entertainment.It sets a pattern of life and, in many ways, determines social status in life, selection of friends, leisure and interest.

     In choosing a profession you should first consider the type of work which will suit your interest. Nothing is more sad than taking on a job in which you have no interest, for it will not only ruin your talents but also discourage your desire to succeed in life.

1. Few school leavers have plans for the long term when finding jobs because _____.

A. they are lowly paid

B. they are not well trained

C. it is difficult to get employed

D. they don't know what they are interested in 

2. According to the passage, the difficulty in choosing a suitable job mainly lies in that _____.

A. much competition has to be faced

B. many employees have no working experience

C. the young people only care about how much they can earn

D. schools fail to offer students appropriate vocational guidance

3. In the writer's opinion, which of the following statements is most important?

A. Your job must suit your interest.

B. Your job must set a pattern of life.

C. Your job must offer you a high salary.

D. Your job must not ruin your talents.