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【单选题】
关于医院内感染概念的描述，错误的是( )。A.
感染和发病应同时发生
B.
住院患者是医院内感染的主要对象
C.
出院后发生的感染可能是医院内感染
D.
是患者在住院期间遭受的感染
E.
不包括在入院前处于潜伏期的感染
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举一反三
【单选题】Which of the following is an accurate description of "Moore's Law"?
A.
The cost of microprocessor chips is halved about every eighteen months.
B.
The amount of data that can be transmitted over an optical fiber cable doubles about every nine months.
C.
The number of transistors fitting on a chip doubles about every two years.
D.
The cost of a semiconductor fabrication plant doubles about every four years.
【单选题】Which of the following statements is true of Moore's Law?
A.
It is based on the technological advancements in weapon manufacturing.
B.
It made the cost of data processing, communications, and storage essentially zero.
C.
It states that the total number of transistors produced in the world doubles every 18 months
D.
It has resulted in obsoleting the use of transistors.
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