没有明确潜伏期的感染，发生在入院48小时以后的就是医院感染。

阅读下面短文，把A-D四个句子填入文中空缺处（1-4），使短文内容完整正确，然

后完成第5题。

    Have you ever complained why life is so tiring? Does the sky sometimes seem dark to

you? Are your studies sometimes not successful? 1_____ If you see the world with your

warm heart, you'll find that the whole world smiles to you.

    While in school, sometimes you are tired of your lessons, but have you ever noticed the

happy smile on your teacher's face when you did a good job?

    One day it is fine. Just before you want to go out, it suddenly starts to rain. 2_____ But

dear friends, why don't you sit down and listen to the free concert that the nature offers you?

And with the timely rain, crops in the fields will grow better and better and farmers will have

a good harvest.

    Although everyone wants to succeed in what he tries to do, sometimes failure (失败) can't

be avoided. 3_____ When we face failure, we must be confident of ourselves, draw a useful

lesson from it and try our best to finish what we have decided to do. 4_____ 

    Attitude decides everything. With an optimistic (乐观) attitude life is easy and pleasant. Let's

smile to whatever we meet and the whole world will smile to us.

A. I think failure is not terrible, and the terrible thing is that we are afraid of it

    and give up hope.

B. Well, friends, cheer up and smile all t he time.

C. Maybe you would feel very sad and start complaining about the weather.

D. As a popular saying goes, "Failure is the mother of success."

5. The best title of this passage is _____. [ ]

A. Smile and the World Smiles to you

B. Complaining about the life

C. Failure is the Mother of Success

D. It is Very Hard to Succeed.

下列哪项不符合传染性单核细胞增多症的血象特点（）

A.白细胞数增多或正常

B.异形淋巴细胞增多

C.血红蛋白量及血小板数一般正常

D.血象异形淋巴细胞数不及骨髓象

E.异形淋巴细胞主要是T淋巴细胞

HLA的遗传学特点包括（）。

A.隐性遗传

B.双倍型遗传

C.共显性遗传

D.连锁平衡

E.显性遗传

溅渣护炉的机理首先是由于溅渣层具有（）现象

A.分熔

B.选择性熔化

C.异相分流

D.不易熔化

E.都不对

2010年《黄河钻井总公司党委、黄河钻井总公司安全生产问责制度》规定，对特别严重违章者每发现一次，给予安全负责人经济处罚（）元。

A.500元

B.1000元

C.1500元

D.2000元