- You aren't supposed to smoke in public. It's bad for our health.
- Sorry, I will ______ my cigarette right now.
A:give up
B:put down
C:put out
D:give away
以正方形ABCD的AB边为直径作半圆O,过点C作直线切半圆于点F,交AB边于点E,若△CDE的周长为12,则直角梯形ABCE周长为( )
△ABC与△DEF相似,且相似比是23,则△DEF与△ABC的相似比是( )