为什么说采用俯斜墙、卸荷板和减压棱体结构时有减小土压力作用？

栝萎根在复元活血汤中的主要治疗作用是

A．清热润燥

B．生津止渴

C．消肿排脓

D．消瘀散结

E．清热凉血

自古以来，每一次科学的重大发现和技术的重大发明及其应用，对人类社会的发展都产生了重大影响。

（1）科技进步对道德的发展有哪些积极作用？

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（2）有人认为“科学上能做到的，就不应禁止”。请从科技伦理的角度谈谈你的认识。

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运行中的电能表除了周期检查内容以外，在安装现场检验的内容有哪些？

药品销售记录应保存少于

A．1年
B．2年
C．3年
D．4年
E．5年
根据《药品生产质量管理规范》

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.

The boy ______.

A．wore new and nice clothes
B．had much money in his hand
C．was from a poor family

D．wanted to get a doll very much