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【单选题】
下列关于污染热原的途径,错误的是A.
灭菌不彻底
B.
从溶剂中带入
C.
从原料中带入
D.
从配液器具中带入
E.
在操作过程中污染
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反馈参考答案：
举一反三
【单选题】A brand ________ is the set of all brands and brand lines a particular firm offers for sale to buyers in a particular category.
A.
architecture
B.
position
C.
portfolio
D.
extension
【单选题】If a firm happened to be the only seller of a particular product, it might behave as a price taker as long as
A.
there are many buyers.
B.
the transaction costs of doing business with this firm are low.
C.
there is free entry and exit.
D.
buyers have full information about the firm's price.
【单选题】The collection and summarization of the socioeconomic and physical characteristics of the employees of a particular firm is an example of
A.
inferential statistics.
B.
descriptive statistics.
C.
a parameter.
D.
a statistic.
【判断题】Systematic risk is the risk that is unique to a particular firm or industry.
A.
正确
B.
错误
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