能用1%盐酸提取出的成分是 A．黄酮 B．黄酮醇 C．查耳酮 D．花色素 E．

任务型阅读。

      Your arms and legs'will become weak if you do not use them for a long

time. When you want to use them again, they slowly become strong again.

Everybody knows that. Yet many people do not seem to know that memory

works in the same way.

     When someone says that he has a good memory, he really means that he

keeps his memory in practice by using it. When someone else says that his

memory is poor, he really means that he does not give it enough chance to

become strong.

     If a friend says that his arms and legs are weak, we know that it'is his own fault(过错).  But if he tells us that he has a poor memory, many of us think

that his parents are to be blamed(责备) , and few of us know that it is just his own fault.

     Have you ever found that some people can't read or write but usually they have better memories?This is because they cannot read or write and they have to remember things; they cannot write them down in a little notebook. They

have to remember days, names, songs and stories, so their memory is the

whole time being exercised. So if you want to have a good memory, learn

from the people: practice remembering.

1. If vou clon't use your__________ for along time, you will find it_______to use them again

2. When someone savs that he has a__________memory,he really means that he keeps his memory by using lt．

3. The more you use your memory, the_______________memory you

will have.

4．If there is someone who can't mflmory something easily, that means he

does not give it_______________to becorne slrong.

5. We should remember a lot of things every day to___________.

下图是l3世纪和现代亚热带北界分布示意图，从中可推测

A、13世纪比现代暖

B、13世纪比现代冷

C、13世纪的南京位于温带地区

D、13世纪的郑州位于亚热带地区

下列文件中，不属于工程咨询单位环境管理体系文件的是()。

A.组织机构图

B.管理评审报告

C.管理手册

D.作业文件

（）一般按公司股票当前的市场价格回购股票。

A.私下协议批量回购

B.转换要约

C.公开市场回购

D.现金要约回购

柔性自动化加工系统中，刀具管理的任务包括哪几个方面？