函数f(x)=4x2-mx+5在区间[-2,+∞]上是增函数,在区间(-∞,-2)上是减函数,则f(1)等于[ ]
A.-7
B.1
C.17
D.25
答案:D
写一个图象经过第二、四象限的正比例函数:______.
按括号内要求完成下列句子,每空格限填一词。
1. Ed Smith plays sports every day. (改为一般疑问句)
_____ Ed Smith _____ sports every day?
2. They like chicken for dinner. (改为否定句)
They _____ _____ chicken for dinner.
3. My soccer ball is under the table. (就划线部分提问)
_____ is _____ soccer ball?
4. Her shoes are fifty yuan. (对划线部分提问)
_____ _____ are these socks?
5. We don't have any classes on Saturdays and Sundays. (改为同义句)
We don't have any classes _____ _____.