皮皮学，免费搜题
登录
搜题
【简答题】
已知函数f(x)＝ (a是常数且a>0)．对于下列命题： ①函数f(x)的最小值是－1； ②函数f(x)在R上是单调函数； ③若f(x)>0在[ ，＋∞)上恒成立，则a的取值范围是a>1； ④对任意x 1 <0，x 2 <0且x 1 ≠x 2 ，恒有f( )$amp; . 其中正确命题的所有序号是________．
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
反馈参考答案：
举一反三
【简答题】试比较进程间的低级通信工具与高级通信工具
【单选题】听力原文：M: What do you know about our new English teacher? W: It's said that he is a middle-aged man. And he is strict with students. M: Really? I prefer the former teacher to him. What's the man's opini...
A.
He is strict.
B.
He is a middle-aged man.
C.
The man likes the new teacher.
D.
The man doesn't like the new teacher.
【单选题】“Light travels faster than sound,” the teacher said.
A.
The teacher said that the light travels faster than the sound.
B.
The teacher said that the light travelled faster than the sound
C.
The teacher said that the light has travelled faster than sound.
D.
The teacher said that the light had travelled faster than sound.
【简答题】Check - in Requirements Passengers and their baggage must be checked in at least 45 minutes before departure for domestic flights and 60 minutes for international flights. Government - issued photo id...
【单选题】The teacher said, “What are you thinking about?”=The teacher asked me _______ thinking about.
A.
what were you
B.
what you were
C.
what I was
D.
what was I
【单选题】'I wish you’d look at me when I'm trying to speak to you!' the teacher said .
A.
excitedly
B.
pleasantly
C.
hopefully
D.
angrily
【简答题】股票有不同的分法，按照股东权益的不同的可以分为（ ）。
相关题目：
参考解析：
知识点：
题目纠错 0
发布
