肝硬化患者出血倾向的最主要原因是() A.维生素K缺乏 B.毛细血管脆性增加 C.血

题型:单项选择题

问题:

肝硬化患者出血倾向的最主要原因是()

A.维生素K缺乏

B.毛细血管脆性增加

C.血小板质和量异常

D.凝血因子合成障碍

E.血中抗凝物质增加

考点:上海住院医师医学检验科感染科感染科题库
题型:单项选择题

Internet shopping is a new way of shopping. Nowadays, you can shop for just about anything from your armchair. All you need is a computer which is linked to the Internet. Shopping on the Internet is becoming increasingly popular. In the United States, people spent over US $2.5 billion on Internet shopping in 1998. This figure is expected to reach US $11 billion by the year 2004.

People can shop for a variety of products on the Internet. Physical products include items such as books, CDs, clothes and food. These types of products are the most common purchases through the Internet. You can also buy information products such as on-line news or magazine stories, or you can download computer software through the Internet. Services such as booking airline tickets, reserving hotels or renting cars are also available on the Internet. You can also go shopping on the Internet for entertainment services and take part in on-line games.

Internet shopping offers a number of benefits for the shopper. The most important advantage is convenience. You can shop when you like as the on-line shops are open 24 hours a day and you don’t have to queue with other shoppers at the checkout counters. Secondly, it is easy to find what you are looking for on the Internet. Even out-of-print books may be ordered on line. Finally, it is often cheaper to buy goods through the Internet, and you can tell the shop exactly what you want.

The main disadvantage of Internet shopping is that you cannot actually see the products you are buying or check their quality. Also, many people enjoy shopping in the city and miss the opportunity to talk to friends. Some people are worried about paying for goods using credit cards, so Internet companies are now finding ways to make on-line payment safe.

Internet shopping is sure to become more and more popular in the years ahead. It promises to change the way we buy all kinds of things—from tonight’s dinner to a new car.

In the passage, which of the following disadvantages of Internet shopping is not mentioned().

A. customers cannot actually see the products they are buying

B. customers cannot check the product’s quantity they are buying

C. many people enjoy shopping in the city and miss the opportunity to talk to friends

D. some people are worried about paying for goods using credit cards

题型:单项选择题

为了增大运输规模,采取相应措施使一次装运数量达到足够大的运输策略是()

A.转运策略

B.延迟策略

C.集运策略

D.维持策略

题型:单项选择题

什么叫安全电压?

题型:单项选择题

某企业制定了《建筑文明施工安全标准图集》,该图集的适用范围是()。

A.全国

B.企业所在行政区域

C.企业所在行业

D.企业内部

题型:单项选择题

颗粒污染物中,粒径在10bm以下的称为( )。

A.TSP

B.PM10

C.降尘

D.烟尘

更多题库