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问题 补全对话，情景问答
仔细阅读，补全对话。
A. What are they doing
B. She is my sister
C. Hi
Li Yan: Hello, Lynn.
Lynn: ____________, Li Yan.
Li Yan: Look at the girl. Who (谁) is she?
Lynn: ____________. And the boy is my brother.
Li Yan: Oh, ____________?
Lynn: They are playing.
答案

C  B  A

选择题
已知直角三角形中30°角所对的直角边为2㎝，则斜边的长为（   ）

A.2 ㎝
B.4 ㎝
C.6 ㎝
D.8㎝
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单项选择题 A1/A2型题

出现股动脉枪击音的疾病有（）。

A.室缺

B.房缺

C.动脉导管未闭

D.法洛四联症

E.主动脉瓣狭窄
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