问题
单项选择题
风湿性心脏病最易合并感染性心内膜炎的是（）。
A.二尖瓣狭窄
B.主动脉瓣狭窄
C.二尖瓣关闭不全并主动脉瓣关闭不全
D.二尖瓣狭窄并关闭不全
E.二尖瓣狭窄并肺动脉瓣关闭不全
答案
参考答案：C
搜题请搜索小程序“爱下问搜题”
风湿性心脏病最易合并感染性心内膜炎的是（）。
A.二尖瓣狭窄
B.主动脉瓣狭窄
C.二尖瓣关闭不全并主动脉瓣关闭不全
D.二尖瓣狭窄并关闭不全
E.二尖瓣狭窄并肺动脉瓣关闭不全
参考答案：C
| Passage One Questions 26 to 28 are based on the conversation you have just heard. |
A．Because he registered the".ch" for China and sent the first e-mail in China.
B．Because he set up China’s first online comic dialogue website.
C．Because be provided integrated online services.
D．Because he was regarded as the father of Internet in China.