脑挫裂伤后2～3日，病灶周围常伴有局限性脑水肿是A．血管源性脑水肿 B．细胞性脑水肿

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.

On-line news and magazine stories are ().

A. the most popular products on the Internet

B. not yet available on the Internet

C. everywhere on the Internet and free to download

D. information products available on the Internet

有关十二指肠溃疡的治疗最重要的是（）。

A.保护胃黏膜

B.中枢镇静剂

C.控制胃酸

D.早期手术

E.少食多餐

（10分）现有两个电阻R和R₀，R为标准电阻，R₀的阻值随温度变化.一探究小组用图甲电路(虚线框内还有一个滑动变阻器)，经多次测量、描点，画出了两电阻的伏安特性曲线如图乙所示，其中两电阻电流从零开始变化.已知电源电动势为6 V,内阻很小.

(1)选出最适合本实验的滑动变阻器__________

A.5 Ω   0.6 A       B.20 Ω   0.6 A       C.100 Ω  0.6 A

(2)在图中虚线框内补充完整电路图.

(3)实验中，当电流表的示数为0.1 A时，电阻R₀消耗的电功率为_______W；由图线知，R₀的阻值随温度升高怎样变化？________________________________________________________________.

《财政部为答参议院刘星楠等质问书上复国务院咨呈》的语言特色是（）。

A.对应置答

B.貌恭词朴

C.重略轻详

D.避重就轻

红树林为什么叫红树林（）。

A.树叶是红色的

B.开的花是红色的

C.树干的横切面是红色的