More and more people prefer to travel on ______ plane, because you can have a comfortable and quick journey, but make sure you get ______ safe one. A. the; the B. a; the
When men get together，they seldom talk about their feelings or inner thoughts．However，they talk about a lot，like their newest computer，how to repair their car，or even business. Talk migh
的图象，利用图象：（1）求方程
的解；（2）求不等式
＞0的解；（3）若
，求
的取值范围。
;(2)
;(3)
．