正确答案: B

钝角三角形

题目：三角形的一个外角是锐角，则此三角形的形状是（ ）

解析：B

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举一反三的答案和解析：

[单选题]30．

playing

解析：30．B【解析】“like+V-ing形式”表示“喜欢做……”。

[单选题]Sally is a student of Grade Eight． She always works hard (11 ) her lessons． English is her favorite (12 )． She thinks that it is as (13 ) as Chinese， but it's more difficult (14 ) than Chinese． For example， a lot of English words and expressions are hard to remember．She often carries her walkman with her， and she spends time (15 ) English tapes every day．It (16 )her listening better and better．Sally is (17 ) student in her class． She often helps her classmates (18 ) their lessons after (19 ) her homework． Most of her classmates like t0 (20 ) her when they have ques- tions． They think she is smart and outgoing．

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