一口枯井深20米,一只青蛙从井底向上爬,白天向上爬5米,晚上向下滑落2米,至少经过____ 天,这只青蛙才能爬出枯井.
变换句式
例:有几个虫子怕什么?
改为陈述句:有几个虫子不用怕。
①叶子上的虫还用治疗?(改为陈述句)
②天不过井口那么大,还用飞那么远吗?(改为陈述句)
如图为二次函数y=ax2+bx+c(a≠0)的图象,则下列说法:①a>0 ②2a+b=0 ③a+b+c>0 ④当﹣1<x<3时,y>0其中正确的个数为( )
A
Fascinating Plant Show
All kinds of plants from all over the world will surprise you!
Time: 8:00 am—6:00 pm, May 1st—May 10th
Ticket price: ¥10
Place: People's Park
Traffic: No.1 Bus, No.10 Bus, No.12 Bus
Welcome to the Biggest Gardening Club!
Do you like gardening? Do you want to learn how to plant flowers? Please come to the Gardening Club.
Time: 10:00 am—4:30 pm, Wednesday—Sunday
Tel: 15831777899
Mr. Mango's Fruit Store Sale
We have all kinds of fresh fruits on sale. Do you like apples? We have red apples for only ¥2/kilo. We also have mangoes(芒果) for¥6/kilo, watermelons for¥1/kilo and pears for ¥2/kilo. Come and see by yourself.
Time: 8:00 am—8:00 pm
Hotline: 5684764