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【单选题】
传染病的流行过程是指:A.
传染源不断向外界排除病原体的过程
B.
病原体沿一定传播途径扩散的过程
C.
易感人群受到病原体侵袭而发病的过程
D.
一系列相互联系、相继发生的新旧疫源地的过程
E.
病原体在外界环境中不断繁殖的过程
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举一反三
【单选题】Which of the following statements is INCORRECT?
A.
The woman seems to be negative about advertising.
B.
The woman appears to know more about advertising.
C.
The man is to be present at a debate on advertising.
D.
The man has a lot to talk about on advertising.
【单选题】The main point of the text is that______.
A.
the negative effects of a lack of truthful advertising laws must be avoided at all costs
B.
because truthful advertising laws exist, the economy is prosperous and healthy
C.
without enforceable and reliable truth in advertising, the American economic system could not properly function
D.
the result of a lack of truthful advertising laws in the United States is foreseeable, and thus examinable
【简答题】从物质与精神的关系来看，“画饼不能充饥”，这是因为 ( ) 。 A ．精神与物质不具有同一性 B ．精神不能转化为物质 C ．事物在人脑中的反映不等同于事物自身 D ．观念的东西不能代替物质的东西
【单选题】如果有两个相邻的业务区A、B，A的PILOT_INC设置为3，B的PILOT_INC设置为4，则两业务区相邻边界的基站的PN应设置为（）的倍数。
A.
3
B.
4
C.
6
D.
12
【单选题】果蝇有10 4 对基因，假设每个基因的突变频率都是10 -5 。如果该种群有10 8 个个体，则种群中的基因突变数约为 [ ]
A.
1×10 7 个
B.
2×10 7 个
C.
4×10 6 个
D.
2×10 8 个
【单选题】Now please put your luggage on the conveyor belt.这句话中conceyor belt的意思是
A.
传送带
B.
称重台
C.
置物架
D.
检查带
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