据测算，目前我国农业增加值每增长1个百分点，商品零售物价指数_爱下问搜题

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问题选择题

据测算，目前我国农业增加值每增长1个百分点，商品零售物价指数就下降0.46个百分点;乡镇企业增加值每增长1个百分点，国民生产总值就增加0.2个百分点;农民收入每增长1个百分点，国民生产总值就增长0.51个百分点。上述材料表明(　　)

A．农业生产的发展对农民增加收入起了重要作用

B．乡镇企业的发展对农民增加收入起了重要作用

C．农业和农村经济与国民经济相互制约、相互促进

D．农业是我国国民经济的基础

答案

答案：C

本题考查学生对“三农”问题的认识，着重考查“三农”问题与国民经济的关系。要求学生从具体材料中概括出一般的道理，考查了学生的归纳能力。A、B两项虽然观点正确，但偏离了题干的中心，应排除。D项虽扣住了题干中心，观点也正确，但只谈了农业一个方面，不够全面。C项既正确又全面地反映了题干所给材料。

选择题

如图所示，处在磁感应强度为B的匀强磁场中的单匝矩线圈abcd，以恒定的角速度ω绕ab边转动，磁场方向垂直于纸面向里，线圈所围面积为S，线圈导线的总电阻为R．t=0时刻线圈平面与纸面重合，且cd边正在离开纸面向外运动．则正确的是（　　）

A．时刻t线圈中电流的瞬时值icosωt

B．线圈中电流的有效值I

C．线圈中电流的有效值I=

D．线圈消耗的电功率P

单项选择题

When I was looking for a Christmas present for my daughter in a toy store, a nicely dressed little girl, with some money in her little hand, was looking at some beautiful dolls. When she saw a doll she liked, she would ask her father if she had enough money. He usually said yes.
At the same time, a boy, with old and small clothes, was looking at some video games. He, too, had money in his hand, but it looked no more than five dollars. Each time he picked up one of the video games and looked at his father, he shook his head.
The little girl had chosen her doll, a very beautiful one. However, she noticed the boy and his father. She saw the boy give up a video game with disappointment and walk to another corner of the store.
The little girl put her doll back to the shelf and ran over to the video game. After she talked to her father, she paid for the video game and whispered(耳语) to the shop assistant.
So the boy got the video game that he wanted for free—he was told it was a prize from the store. He smiled happily, although he felt it was so incredible. The girl saw all this happen. She smiled, too.
When I walked out of the store to my car, I heard the father ask his daughter why she had done that. I would never forget their short talk. "Daddy, didn’t Grandma want me to buy something that would make me happy"
He said, "Of course, she did."
"Well, I just did!" With that, the little girl started skipping towards their car happily.

Which of the following is TRUE according to the story

A. The little girl was kind and helpful.
B. The video game was a prize from the store.
C. The writer paid for the video game for the boy.
D. The boy bought the video game himself from the store.