能将外界声波刺激转化成声音信息的部位是[ ] A．鼓膜 B．听小骨 C．耳蜗 D

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.

14（）

A. Because of

B. Apart from

C. Despite

D. Though

When your mother goes out, who will _________ your baby sister?[ ]

A. look for

B. look at

C. look after

D. look up

请结合下列实验常用装置，回答有关问题。

⑴写出图中标有字母的仪器名称：a____________。

⑵若加热氯酸钾和二氧化锰的混合物制取氧气，应选用的发生装置是__________（填“A”或“B”），在加入药品前，应首先_____________，反应的化学方程式是________________________________。

⑶若要制取二氧化碳，应选用的装置是__________(填写相应字母)，检验二氧化碳是否收集满的方法是________________________。

治疗鼓胀瘀结水留证，应首选

A．中满分消丸

B．实脾饮

C．少腹逐瘀汤

D．调营饮

下列最易发生血道转移的癌是（）。

A.基底细胞癌

B.子宫绒毛膜上皮癌

C.乳腺导管内癌

D.胃粘膜内癌

E.大肠粘膜内癌