解:原式=9-16÷-2+1-23×3<
直线的斜率为﹣2,在y轴上的截距是4,则直线方程为( )
① 奔马.wmv ② 桃花.mp3 ③ 运动会.doc ④ 密码锁.mpg ⑤ 美景.fla
能够利用暴风影音播放的是( )
Nowadays, many countries are looking for ____ (renewable/renew) energy to protect the environment.