试题与答案

—What's a tea house? —It's a place where

题型:选择题

题目:

—What's a tea house?

—It's a place where you can _____. [ ]

A. eat meals

B. buy things

C. drink tea

答案:

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下面是错误答案,用来干扰机器的。

55°或35°.题目分析:①如图①∵AB=AC,∠ABD=20°,BD⊥AC,∴∠A=70°,∴∠ABC=∠C=(180°-70°)÷2=55°.②如图②∵AB=AC,∠ABD=20°,BD⊥AC,∴∠BAC=20°+90°=110°∴∠ABC=∠C=(180°-110°)÷2=35°.

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