题目内容

Which is NOT correct about "Venus"？

A. It is the second planet from the Sun.
B. It is the brightest object in the sky.
C. It is the sixth largest planet in solar system.
D. It is usually visible with the naked eyes.

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Which is NOT the effort that the rail companies do to change their image？

A. They took steps to minimize damage to products.
B. They increase their shipping capacity.
C. Reduced their lines by 1/3.
D. They begin to take less care for the customer's products.

不属于医院感染的是

A. 病人在医院内获得的感染
B. 新生几经胎盘获得(出生后48小时内发病)的感染
C. 出院时已处于潜伏期且出院后不久发生的感染
D. 入院后超过平均潜伏期后发生的感染
E. 手术后输血造成的病毒感染

房源的初始价格是由（）决定的。

A. 法律文件
B. 投资商
C. 使用价值
D. 业主

市场调查人员通过确定一些控制特征，将样本空间进行分类，然后由调查人员从各组中任意抽取一定数量的样本属于（）。

A. 配额抽样
B. 便利抽样
C. 判断抽样
D. 分群抽样