— The owner of the small shop fought to stop the big corporation from knocking it down.
— Yes, and he finally made it. It was indeed __________.
A:a catch-22 situation
B:a Pandora's box
C:a David and Goliath battle
D:a Jekyll and Hyde existence
在△ABC中,三个内角A,B,C的对边分别为a,b,c,满足sinA+sinB=sinC(cosB+cosA).
(1)证明:△ABC是直角三角形;
(2)如图所示,设圆O过A,B,C三点,c=2,∠BAC=π6,点P位于劣弧AC∧上,求△PAC面积的最大值.
This restaurant p____people with delicious Japanese food.Let's eat there.
下列句子中标点符号使用正确的一项是( )
礼貌待人是人际交往的最起码的要求。( )