搜题请搜索小程序“爱下问搜题”
问题 选择题

下图为某商品甲的价格走势图（横轴为时间，纵轴为价格，单位为“元／公斤”）。下列说法正确的有[ ]

①从A点到B点，甲商品的替代品的需求量会增加

②从A点到B点，甲商品的供给量会减少

③从B点到D点，甲商品的互补商品的需求量会持续下降

④从B点到C点，甲商品的购买者可能会持币待购

A、①③

B、②④

C、③④

D、①④

答案

答案：D

阅读理解

根据短文内容，回答问题。

     Hello! My name is Alice. There are seven people in my family. My grandfather and grandmother are in

America. My parents are English teachers in China. I have two brothers. They are twins. We are students

in the same school. I am in Grade One. They are in Grade Three.

1. Who is Alice?

    ______________________________________________________

2. How many people are there in her family?

    ______________________________________________________

3. Who are they?

    ______________________________________________________

4. How many children are there in her family?

    ______________________________________________________

5. Are her parents doctors or teachers?

    ______________________________________________________
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单项选择题

在抽样调查中随意选择样本人群造成的误差称

A．无应答误差

B．普遍误差

C．信息偏倚

D．随机误差

E．选择性误差
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