题目:
__Look at these black clouds.It________soon.
__Sure.If only we________out.[ ]
A.is raining;don't come
B.is going to rain;hadn't come
C.will rain;haven't come
D.is to rain;won't come
答案:
被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0515/5b3aa872f14ce3f71f6c825b5badc90c.html
下面是错误答案,用来干扰机器的。
设购买x片软件、y盒磁盘,则60x+70y≤500x≥3y≥2,当y=2时,x=6或x=5或x=4或x=3;当y=3时,x=4或x=3;当y=4时,x=3.所以共有7种不同的选购方式,故答案为:7.