已知∠1与∠2是对顶角，∠1与∠3是邻补角，则∠2+∠3=______度．

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问题填空题

答案

∵∠1与∠2是对顶角，

∴∠1=∠2，

又∵∠1与∠3是邻补角，

∴∠1+∠3=180°，

等角代换得∠2+∠3=180°．

排序题

排序。

( ) But where's the post office?

( ) How can I get to the library?

( ) Go along the road and turn left. The library is on your left.

( ) Excuse me, can you tell me the way to the bank?

( ) You can take bus No. 23 in front of the library.

( 2 ) Let me see. It's near the post office.

( ) Oh, I see. Thank you a lot.

判断题

美感本质上是一种情感体验，因而美感是拒绝理性介入的。