问题 单项选择题 共用题干题

男性,34岁。盖房子时因土墙垮塌砸伤左小腿。伤后35分钟被送往当地卫生院行清创缝合术。第2天夜间,患者感伤肢沉重感,行走困难,疼痛逐渐加剧,自觉发热,全身无力。次日,病情加重,急来院就诊。查体:T40℃,P130次/分,R20次/分,BP100/60mmHg。痛苦面容,贫血貌。表情淡漠,烦躁,呼吸急促。整个左小腿延至大腿肿胀明显,左小腿下1/3外侧有一4cm长而不规则缝合伤口,周围皮肤苍白、紧张发亮,伤口中有恶臭味的血性液和气泡溢出。触诊肢体有捻发音。实验室检查:RBC2.0×1012/L,Hb40%,WBC12×109/L,N90%。尿常规:血红蛋白尿。左小腿X线平片检查:肌群内有积气阴影。

应用抗生素治疗,首选().

A.第三、四代头孢菌素+甲硝唑

B.青霉素+甲硝唑

C.庆大霉素+甲硝唑

D.卡那霉素+甲硝唑

E.四环素+甲硝唑

答案

参考答案:B

单项选择题

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.

12()

A.consequently

B.though

C.however

D.yet

单项选择题