问题
选择题
—I am going to Sanya with my family for the National holiday.
— _________.[ ]
A. That's not a good idea.
B. Good luck.
C. Take care.
D. Have fun.
答案
答案:D
—I am going to Sanya with my family for the National holiday.
— _________.[ ]
A. That's not a good idea.
B. Good luck.
C. Take care.
D. Have fun.
答案:D
根据国家发改委实施“阶梯电价”的有关文件要求,某市结合地方实际,决定从2012年5月1日起对居民生活用电试行“阶梯电价”收费,具体收费标准见下表:
(1)上表中,a= ;b= ; (2)请直接写出y与x之间的函数关系式; (3)试行“阶梯电价”收费以后,该市一户居民月用电多少千瓦时时,其当月的平均电价每千瓦时不超过0.62元? |