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问题 多项选择题

骨折愈合过程中下列哪项是错误的()

A．膜内化骨快于软骨内化骨，内骨痂快于外骨痂

B．内、外骨痂由膜内化骨而来，环状骨痂及腔内骨痂由软骨内化骨而来

C．骨痂由血肿机化而来，较大的血肿对骨愈合有利

D．血肿炎症机化期约需2周才能初步完成

E．原始骨痂形成期约需4～8周完成

答案

参考答案：A, C

单项选择题

麻疹的隔离期为

A．至出疹后5天

B．从接触后1天至皮疹消退

C．接触后2周至皮疹消退

D．从出疹至皮疹消退

E．发疹前1天至出疹后3天
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单项选择题

Like many other aspects of the computer age, Yahoo began as an idea, (1) into a hobby and lately has (2) into a full-time passion. The two developers of Yahoo, David Filo and Jerry Yang, Ph. D candidates (3) Electrical Engineering at Stanford University, started their guide in April 1994 as a way to keep (4) of their personal interest on the Internet. Before long they (5) that their homebrewed lists were becoming too long and (6) . Gradually they began to spend more and more time on Yahoo.

During 1994, they (7) yahoo into a customized database designed to (8) the needs of the thousands of users (9) began to use the service through the closely (10) Internet community. They developed customized software to help them (11) locate, identify and edit material (12) on the Internet. The name Yahoo is (13) to stand for "Yet Another Hierarchical Officious Orale", but Filo and Yang insist they selected the (14) because they considered themselves yahoos. Yahoo itself first (15) on Yang’s workstation, "akebono", while the search engine was (16) on Filo’s computer, "Konishiki".

In early 1995 Marc Andersen, co-founder of Netscape Communication in Mountain View, California, invited Filo and Yang to move their files (17) to larger computers (18) at Netscape. As a result Stanford’s computer network returned to (19) , and both parties benefited. Today, Yahoo (20) organized information on tens of thousands of computers linked to the web.

6（）

A.unwieldy

B.tough

C.tamable

D.invaluable
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