如图所示的电路中，开关都闭合时，三个电流表的示数分别为I1、I2、I3．已知I1

地球上最初出现的原始生物最可能是

A．动物

B．古猿

C．植物

D．单细胞生物

治疗肾病综合征患者的高凝状态，一般使用的药物有()

A．潘生丁片

B．肝素钠针

C．阿司匹林

D．立平脂

E．尿激酶

___________ muchos, Espa a significa sol y playa solamente, y aunque eso es verdad, los aficionados ___________ el esquí (滑雪) también pueden disfrutar allí. Hay treinta estaciones de esquí en Espa a, y están repartidas ___________ tal manera que desde cualquier ciudad espa ola se puede ir ___________ esquiar ___________ tener que viajar más de doscientos cincuenta kilómetros. Incluso en Sierra Nevada, junto ___________ Granada, ___________ sólo hora y media ___________ coche ___________ la Costa del Sol, se encuentra nieve donde esquiar.

为尽量保留健康牙体组织以下操作正确的是

A．洞形做最小程度的扩展

B．窝洞的龈缘尽量位于牙龈边缘的牙合方

C．尽量不做预防性扩展

D．有发育缺陷的点隙裂沟可用窝沟封闭等处理预防

E．以上都正确

Who won the World Cup 1994 football game What happened at the United Nations How did the critics like the new play (1) an event takes place, newspapers are on the streets (2) the details. Wherever anything happens in the world, reporters are on the spot to (3) the news.

Newspapers have one basic (4) , to get the news as quickly as possible from its source, from those who make it to those who want to (5) it.

Radio, telegraph, television, and (6) inventions brought competition for newspaper. So did the development of magazines and other means of communication. (7) , this competition merely spurred the newspapers on. They quickly made use of the newer and faster means of communication to improve the (8) and thus the efficiency of their own operations. Today more newspapers are (9) and read than ever before. Competition also led newspapers to branch out into many other fields. Besides keeping readers (10) of the latest news, today’s newspapers (11) and influence readers about politics and other important and serious matters. Newspapers influence readers’ economic choices (12) advertising. Most newspapers depend on advertising for very (13) .

Newspapers are sold at a price that (14) even a small fraction of the cost of production. The main (15) of income for most newspapers is commercial advertising. The (16) in selling advertising depends on a newspaper’s value to advertisers. This (17) in terms of circulation. How many people read the newspaper

Circulation depends (18) on the work of the circulation department and on the services or entertainment (19) in a newspaper’s pages. But for the most part, circulation depends on a newspaper’s value to readers as a source of information (20) the community, city, county, state, nation, and world—and even outer space.

8（）

A.value

B.ratio

C.rate

D.speed