接收器的功能包括，①检波②压缩③排斥④放大A．②③④ B．①②③④ C．②④ D．①

In 1998 consumers could purchase virtually anything over the Internet. Books, compact discs, and even stocks were (1) from World Wide Websites that seemed to (2) almost daily a few years earlier, some people had predicted that consuners accustomed to shopping in stores would be (3) to buy things that they could not see or touch (4) . For a growing number of time-starved consumers, however, shopping from their home computer was proving to be a convenient (5) to driving to the store.

A research estimated that in 1998 US consumers could purchase $ 7.3 billion of goods over the Internet, double the 1997 total. Finding a bargain was getting easier, (6) the rise of online auctions and Websites that did comparison shopping on the Internet for the best (7) .

For all the consumer interest, (8) in eyberspaee was still a largely (9) business, however. Internet pioneer Amazon. eom, which began selling books in 1995 and later (10) into recorded music and videos, posted (11) of $ 153.7 million in the third quarter, up from $ 37.9 million in the same period of 1997. Overall, (12) , the company’ s loss widened to $ 45.2 million from $9.6 million, and analysts did not expect the company to turn a profit (13) 2001. (14) the great loss, Amazon. tom had a stock market value of many billions, reflecting investors’ (15) about the future of the industry.

Internet retailing appealed (16) investors because it provided an efficient means for reaching millions of consumers without having the cost of operating (17) stores with their armies of salespeople. Selling online carried its own risks, however, (18) so many companies competing tor consumers’ attention, price competition was (19) and profit (20) thin or nonexistent.

10（）

A.developed

B.branched

C.separated

D.distributed

经专家研究发现，地震发生地并不是各地均匀分布的，而是与地壳的断层带有密切关系，集中在某几个地带上。专家的发现说明

①事物的运动是有规律的   ②规律独立于人的意识之外

③人们能够利用客观规律   ④思维与存在具有同—性

A．①②

B．③④

C．②③

D．①④

有关徒手抗阻训练中错误的说法是

A．将阻力置于肢体的近端
B．确定阻力的方向，一般为所需运动的相反方向
C．应用合适的阻力力量，初始为次最大阻力，以后逐渐增大阻力，患者的最佳反应为无痛范围的最大努力
D．患者不能完成全关节活动的范围运动、施阻部位疼痛、运动造成肌肉震颤、发生替代运动时，应改变施阻部位或降低阻力力量
E．某一运动的重复次数为8～10次，并在一定休息以后增加次数

调度的好坏，直接体现在( )的成本上。

A．配送
B．运输
C．仓储
D．利润

防止子宫下垂的是（）。

A.子宫骶韧带

B.子宫圆韧带

C.子宫主韧带

D.子宫阔韧带

E.盆底肌