患者，男，36岁，因左下颌第一磨牙拔除后创口持续疼痛而就诊。患者4天前曾行左下颌第一磨牙残冠拔除术，术中断根，拔牙时间较长。拔牙后创口疼痛明显，术后1天稍有好转，术后2～3天疼痛加剧，并向下颌下区和耳颞部放射，拔牙后一直口服抗生素和镇痛药，症状无法控制。临床检查：拔牙窝内空虚，创面成灰白色，触痛明显，棉签擦拭后有恶臭。
若选择在拔牙窝内填塞碘仿纱条，正确的操作是（）
Intel chairman Andy Grove has decided to cut the Gordian knot of controversy surrounding stem cell research by simply writing a check. The check, which he pledged last week, could be for as much as $5 million, depending on how many donors make gifts of between $50,000 and $500,000, which he has promised to match. It will be made out to the University of California-San Francisco (UCSF). Thanks in part to such private donations, university research into uses for human stem cells — the cells at the earliest stages of development that can form any body part — will continue in California. With private financial support, the state will be less likely to lose talented scientists who would be tempted to leave the field or even leave the country as research dependent on federal money slows to a glacial (极其缓慢的) pace. Hindered by limits President Bush placed on stem cell research a year ago, scientists are turning to laboratories that can carry out work without using federal mon
A. interested businesses and individuals
B. the United States federal government
C. a foundation set up by the Intel Company
D. executives of leading American companies
Passage 5
"Fingers were made before forks" when a person gives up good manners, puts aside knife and fork, and dives into his food, someone is likely to repeat that saying.
The fork was an ancient agricultural tool, but for centuries no one thought of eating with it. Not until the eleventh century, when a young lady from Constantinpole brought her fork to Italy, did the custom reach Europe.
By the fifteenth century the use of the fork was widespread in Italy. The English explanation was that Italians were averse to rating food touched with fingers, "Seeing all men’s fingers are not alike clean." English travelers kept their friends in stitches while describing this ridiculous Italian custom.
Anyone who used a fork to eat with was laughed at in England for the next hundred years. Men who used forks were thought to be sissies, and women who used them were called show - offs and overnice. Not until the late 1600’
A. all over Italy
B. only in Constantinpole
C. widely in Europe
D. In England
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