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【单选题】
宝洁公司想确定汰渍的一种新包装设计是否比现有的包装更有效。它在广州随机选择了12个超市,并在其中随机选出6个售卖新包装的汰渍,对两组超市的销售额进行了3个月的监控。请问这是什么实验设计类型()。A.
因子设计
B.
实验后对照设计
C.
实验前后对照设计
D.
随机区组设计
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反馈参考答案：
举一反三
【单选题】He paid 30% of the price for the house , and promised to pay by the end of the month.
A.
those
B.
the others
C.
the rest
D.
the other
【单选题】The price paid by buyers in a market will increase if the government
A.
increases a binding price floor in that market.
B.
increases a binding price ceiling in that market.
C.
decreases a tax on the good sold in that market.
D.
More than one of the above is correct.
【简答题】试述青贮饲料的优越性,青贮的原理及条件?
【单选题】听力原文：M: Look, I bought this T-shirt at half price. I only paid 40 dollars for it. W: Oh, my brother got a similar one for 50 dollars. What is the original price for the T-shirt?
A.
80 dollars.
B.
50 dollars.
C.
40 dollars.
D.
100 dollars.
【单选题】The price paid by buyers in a market will decrease if the government
A.
imposes a binding price floor in that market.
B.
increases a binding price ceiling in that market.
C.
increases a tax on the good sold in that market.
D.
decreases a binding price floor in that market.
【单选题】I型超敏反应的特点
A.
反应发生快,与亲细胞抗体IgE有关
B.
有明显的个体差异和遗传倾向
C.
通常不伴有明显的组织损伤
D.
不需补体参与反应过程
E.
以上均正确
【简答题】It seemed that I had suffered a great loss of business and that was the price I paid for not following my parents' advice.
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