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问题 选择题

在化学反应2CH+13O10HO+8CO中，CH和O之间的质量比是     [ ]

A．1：1   

B．2：13    

C．58：32    

D．116：416

答案

答案：D

阅读理解

Here I'd like to tell you something about my aunt Mary. She is thirty years old. She has a lot of hobbies. She usually gets up early in the morning. And then she walks her dog near the river. She sometimes likes to chat with others near her home after work. She often goes fishing on Saturdays. She loves music. She always goes to the Singing Club on Sundays. She also likes going shopping. Every time she goes to the parks on fine days. She doesn't like watching TV. She is a happy woman.

小题1:How old is Mary?

A．Thirty

B．Twenty-five

C．Twenty-two

D．Twenty小题2:What does Mary do after she gets up?

A．Goes fishing.

B．Chats with others.

C．Walks her dog.

D．Goes to the Singing Club.小题3:When does Mary often go fishing?

A．On Wednesdays.

B．On Sundays.

C．On Saturdays.

D．On Fridays.小题4:Which of the following(下面) doesn't Mary like doing?

A．Going shopping.

B．Going to the parks.

C．Going fishing.

D．Watching TV.小题5:Which is the title (标题) of the passage (文章)?

A．Mary's Work

B．A Funny Woman

C．Mary's Hobbies

D．A beautiful Woman
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单项选择题

心脏病患者，反复发作心悸不适，来诊当天自觉较好。作心电图P波消失呈锯齿状，频率300次／分，室率75次／分。最可能的诊断是（）

A.完全性房室传导阻滞

B.正常心电图

C.房性阵发性心动过速（4：1传导）

D.心房颤动

E.心房扑动（4：1传导）
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