问题
单项选择题 B型题
导致亚急性感染性心内膜炎最常见的微生物是
A.金黄色葡萄球菌
B.草绿色链球菌
C.柯萨奇病毒
D.副流感病毒
E.表皮葡萄球菌
答案
参考答案：B
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导致亚急性感染性心内膜炎最常见的微生物是
A.金黄色葡萄球菌
B.草绿色链球菌
C.柯萨奇病毒
D.副流感病毒
E.表皮葡萄球菌
参考答案：B
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Many people are 2 when they find that the Internet was set up in the 1960s. At that time, computers were large and expensive. Computers network didn't work 3 . If one computer broke down, then the whole network 4 . So a new network system had to be set up. This was why computer network system would keep on 5 all the time. At 6 the Internet was not only used by the government, but in the early 1970s, 7 , hospitals and banks were allowed to use it, too. However, computers were still very 8 and the Internet was difficult to use. By the start of the 1990s, computers became cheaper and easier to use. Scientists has also 9 software (微软) that made "surfing" the Internet more convenient. The Internet has now become one of the most important parts of people's life. Today it is easy to get on-line (上网) and it is said that 10 of people use the Internet every day. Sending e-mail (电子邮件) is more and more popular among students. |