巨细胞病毒有哪些致畸作用?

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问题:

巨细胞病毒有哪些致畸作用?

考点:计划生育知识竞赛计划生育药具知识竞赛计划生育药具知识竞赛题库
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Generally speaking, a British is widely regarded as a quiet, shy and conservative person who is (1) only among those with whom he is acquainted. When a stranger is at present, he often seems nervous, even (2) . You have to take a commuter train any morning or evening to (3) the truth of this.

Serious-looking businessmen and women sit reading their newspapers or dozing in a corner; hardly anybody talks, since to do so would be considered quite (4) .

(5) , there is an unwritten but clearly understood code of behavior which, once broken, makes the offender immediately the object of (6) .

It has been known as a fact that a British has a (7) for the discussion of their weather and that, if given a chance, he will talk about it (8) .

Some people argue that it is because the British weather seldom (9) forecast and hence becomes a source of interest and (10) to everyone.

This may be so. (11) a British cannot have much (12) in the weathermen, who, after promising fine, sunny weather for the following day, are often proved wrong (13) a cloud over the Atlantic brings rainy weather to all districts! The man in the street seems to be as accurate — or as inaccurate — as the weathermen in his (14) .

Foreigners may be surprised at the number of references (15) weather that the British (16) to each other in the course of a single day. Very often conversational greetings are (17) by comments on the weather. “Nice day, isn’t it” “Beautiful!” may well be heard instead of “Good morning, how are you” Although the foreigner may consider this exaggerated and comic, it is (18) .pointing out that it could be used to his advantage. If he wants to start a conversation with a British but is at a loss to know (19) to begin, he could do well to mention the state of the weather. It is a safe subject which will (20) an answer from even the most reserved of the British.

11()

A.Usually

B.Generally

C.Certainly

D.Fundamentally

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设圆C与圆x2+(y-3)2=1外切,与直线y=0相切,则C的圆心轨迹为(  )
A.抛物线B.双曲线C.椭圆D.圆
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根据McCabe环路复杂性度量,如图4-5所示的程序图的复杂度是 (31) ,对该程序进行路径覆盖测试,可得到的基本路径是 (32)

(31)处填()。

A.2

B.3

C.4

D.5

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2008年是周恩来同志诞辰110周年。请阅读材料,结合所学知识回答下列问题。

材料一:

材料二:

请回答:

(1)材料一反映了周恩来同志参加哪次国际会议?他提出了什么方针促进会议圆满成功?

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(2)根据材料二,周思来同志提出的处理国与国之间关系的基本准则是什么?

___________________________________________________________

(3)为缅怀周恩来同志,请你确定一个纪念活动主题。

___________________________________________________________

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一份教案的核心是( )。

A.提出教学目的
B.选择教学方法
C.涉及教学进程
D.规划板书内容

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