下列哪种情况最易并发脑血管栓塞()。 A.二尖瓣狭窄伴心房颤动 B.心肌炎 C.高血

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问题:

下列哪种情况最易并发脑血管栓塞()。

A.二尖瓣狭窄伴心房颤动

B.心肌炎

C.高血压

D.肺动脉瓣关闭不全

E.肺动脉瓣狭窄

考点:心电学技术(医学高级)心电学技术习题集心电学技术习题集题库
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规定一种新运算a*b=a+b-ab,则3*(-4)=          

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据测算,我国每天因土地沙漠化造成的经济损失为1.5亿元,若一年按365天计算,我国一年因土地沙漠化造成的经济损失为多少元(用科学记数法表示,且保留两个有效数字)?

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在美国南北战争和法国资产阶级大革命中,出现了一种节奏铿锵、音调高昂的革命歌曲,《同志们,勇敢的前进》就是其中最著名的一首。()

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“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 good shapes and new look 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 add to beauty or desirability.

Often such products are nothing more than money-making 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 Drug Administration) can require proof under the Food, Drug and Cosmetic Act that it 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 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.

小题1:It can be inferred that ads mentioned in the text are_____.

A.objective

B.costly

C.unbelievable

D.illegal小题2: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小题3:The author intends to______.

A.make consumers aware of the promoters’ false promise

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小题4: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.

题型:单项选择题

下列哪种疾病常引起便秘与腹泻交替出现()

A.肠结核

B.慢性菌痢

C.阿米巴痢疾

D.肠易激综合征

E.慢性非特异性溃疡性结肠炎

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