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【单选题】
How has Edward prepared for Valentine’s Day?A.
He has booked a restaurant.
B.
He has bought some gifts.
C.
He has bought some red roses.
D.
He has prepared a special meal.
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【简答题】句型转换。 1. I would like to have some bananas. (一般疑问句) _______ you _______ to have some bananas? 2. Would you please pass him the doll? (否定句) Would you please _______ _______ him the doll? 3. They went t...
【单选题】—I'd like to have some lunch but I have to stay here doing my work. —___________ what you want and I can get it for you.
A.
To tell me
B.
Telling me
C.
If you tell me
D.
Tell me
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【简答题】某地区居民户数为10000户，其年消费水平标准差为150元。若采取抽样调查了解其年平均消费水平，并以95％的置信度（相对应的函数值为1.96）推断总体，其样本指标与总体指标之间的允许误差范围是20元。要求：用公式计算出应抽查多少居民户？
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