满足方程|x+2|+|x-3|=5的x的取值范围是______．

中国人民抗日军政大学的校风：“团结、紧张、严肃、活泼”是（）制定的？

A.毛 * *

B.刘 * *

C.周恩来

D.朱德

阅读理解。

     "In only six days I lost seven pounds of weight."

     "Two full inches in the first three days!"

      These are the kinds of statements used in magazine,newspaper,radio and television ads,

promising new shapes and new looks to those who buy the medicine or the device.The

promoters of products say they can shape the legs,slim the face,smooth wrinkles,or in some

other way to add to beauty or desirability.

      Often such products are nothing more than moneymaking things for their promoters.The

results they produce are questionable,and some are dangerous to health.

To understand how these products can be legally promoted to the public,it is necessary to

understand something of the laws covering their regulation.If the product is a drug,FDA

(Food and Drug Administration)can require proof under the Food,Drug,and Cosmetic Act

that is safe and effective before it is put on the market.But if the product is a device,FDA

has no authority to require premarketing proof of safety or effectiveness.If a product already

on the market is a danger to health,FDA can request the producer or distributor to remove it

from the market voluntarily,or it can take legal action,including seizure(查封)of the product.

     One notable case a few years ago involved an electrical device called the Relaxacisor,which

had been sold for reducing the waistline.The Relaxacisor produced electrical shocks to the body

through contact pads.FDA took legal action against the distributor to stop the sale of the device

on the grounds that it was dangerous to health and life.

     Obviously,most of the devices on the market have never been the subject of court proceedings

(法律诉讼),and new devices appear continually.Before buying,it is up to the consumer to judge

the safety or effectiveness of such items.

1．It can be inferred that the ads mentioned in the text are________.

A．objective  

B．costly

C．unreliable  

D．illegal

2.Which of the following is TRUE according to the text?

A．The court is in charge of removing dangerous products.

B．New products are more likely to be questionable.

C．The production of a device must be approved by FDA.

D．The promoters usually just care about profits.

3．FDA can ask for the proof of safety and effectiveness of a product________.

A．if it is a drug

B．if it is a device

C．if its consumers make complaints

D．if its distributors challenge FDA's authority

4．The Relaxacisor is mentioned as________.

A．a product which was designed to produce electricity

B．a product whose distributor was involved in a legal case

C．a successful advertisement of a beauty product

D．an example of a quality beauty product

5．The author intends to________.

A．make consumers aware of the promoters' false promises

B．show the weakness of the law on product safety

C．give advice on how to keep young and beautiful

D．introduce the organization of FDA

将要因加以整理，成为相互关系面而有条理的图形，称为（）

A.柏拉图

B.特性要因图

C.散布图

D.直方图

19世纪70年代末，一位英国人写道：“一个重庆商人如果要在上海采办洋货，他可以到一个钱庄……押借一笔款项。……（然后）将订货单寄予他在上海的代理人；钱庄经理也通知与他有关系的上海钱庄或其分庄，由后者向洋行或其中国的代理人处付予这笔款项。”可见此时的钱庄（）

A、已经完全变成了洋行的附庸

B、在中外贸易中居于关键地位

C、一般不愿支持土货出口业务

D、在洋货内销中具有重要作用

图书馆信息服务的优势有（）

a信息资源优势

b人才优势

c设备、设施优势

d技术优势

A.abc

B.bcd

C.abcd

D.acd