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【单选题】
关于化学消毒剂杀菌描述不正确的是( )A.
乙醇杀菌力强，但对芽孢的作用不大
B.
34%~38%的甲醛可用于尸体的保存
C.
氯气常用于消毒自来水和污水是因为可生成杀菌力很强的次氯酸
D.
苯扎溴铵性质不稳定但无腐蚀性、无毒，故可用于皮肤、黏膜等的消毒
E.
0.1%的高锰酸钾溶液可用于蔬菜、瓜果的消毒
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皮皮学刷刷变学霸
举一反三
【简答题】It is used to describe a frequency distribution which is not symmetrical and the left tail is stretched out longer than the right.
【简答题】It is a discrete probability distribution of the number of successes in a sequence of independent Bernoulli random experiments.
【单选题】Distribution center is an economic organization specialized in goods distribution activities. It is also a logistics node integrating processing, tally and ( ) functions.
A.
Purchase
B.
production
C.
sales
D.
delivery
【简答题】It is used to describe a frequency distribution which is not symmetrical and the right tail is stretched out longer than the left.
【单选题】In addition, Nidera is engaged in the distribution of crop technology and it is a leading seed research and production company in South America. 在这句话当中, distribution 的意思是:
A.
分发食品
B.
平均分配
C.
销售
D.
处理
【判断题】Wal-Mart is well known for their progressive distribution systems. While distribution is important, it is not a marketing decision.
A.
正确
B.
错误
【简答题】It is a distribution that the area between negative 1.96 and positive 1.96 is 95%.
【单选题】If the expectation of a sampling distribution is located at the parameter it is estimating, then we call that sampling distribution
A.
unbiased.
B.
minimum variance.
C.
biased.
D.
random.
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