神经母细胞瘤的典型的组织学特点是（） A.瘤细胞呈栅栏状排列 B.肿瘤出血、坏死明显

已知抛物线C：y= 1 4 x2，则过抛物线焦点F且斜率为 1 2 的直线l被抛物线截得的线段长为（　　） A． 9 4 B． 17 8 C．5 D．4

洋地黄的绝对禁忌证为（）。

A.右心衰竭

B.舒张性心力衰竭

C.无症状心力衰竭

D.单纯二尖瓣狭窄伴窦性心律

E.已用β受体阻滞药者

下列各项经营行为所取得的收入中，应征收营业税的有()。

A.国内某航空公司从美国载客入境取得的收入

B.美国某航空公司从上海载货出境取得的收入

C.在京某外国商会为会员提供培训服务取得的收入

D.国内某保险公司为出口货物提供保险取得的收入

Part 4

Questions 26-45

·Read the following text and decide which answer bestfits each space.
·For questions 26-45, mark one letter A, B, C or D on the Answer Sheet.

Newspapers

Who won the World Cup 1994 football game What happened at the United Nations How did the critics like the new play When an event takes place, newspapers are on the streets (26) the details. (27) anything happens in the world, reporters are on the spot to (28) the news.
Newspapers have one basic (29) to get the news as quickly as possible from its source, from those who make it to those who want to (30) it. Radio, telegraph, television, and (31) inventions brought competition for newspapers. So did the development of magazines and other means of communication. (32) this competition merely spurred the newspapers on. They quickly made (33) of the newer and faster means of communication to improve the speed and (34) the efficiency of their own operations. Today more newspapers are printed and read than ever before.
Competition also led-newspapers to branch out into many other fields. Besides keeping readers (35) of the latest news, today’s newspapers (36) readers about politics and other important and serious matters. Newspapers influence readers’ economic choices (37) advertising. Most newspapers depend on advertising for their very (38) Newspapers are sold at a price that (39) to cover even a small fraction of the cost of production. The main (40) of income for most newspapers is commercial advertising. The (41) in selling advertising depends on a newspaper’s value to advertisers. This is measured (42) circulation. How many people read the newspaper Circulation depends (43) on the work of the circulation department and on the services or entertainment (44) in a newspaper’s pages. But for the most part, circulation depends on a newspaper’s value to readers as a source of information (45) the community, city, country, state, nation, and world—and even outer space.

A．details

B．rate

C．use

D．future

气溶胶是指（）。

A.空气中粉尘

B.空气中颗粒物

C.空气中液滴

D.颗粒物悬浮在空气中形成的分散体系

E.空气中的固体和蒸气