做一幅窗帘大约用6米布.现在有228米布,做了一些窗帘后,还剩18米布,已经做好了多少幅窗帘?
(228-18)÷6,
=210÷6,
=35(幅);
答:已经做好了35幅窗帘.
用所给词的适当形式填空。
1. She has a (健康) daughter.
2. I eat onions (两次) a week.
3. How many times do you brush your (牙齿)?
4. (多久一次) do you play basketball?
5. Look! He (洗) his hands.
适时供给汽油发动机工作所需要的可燃混合气的是()
A.燃料供给系
B.冷却系
C.润滑系