消防用水对水质要求不高，但必须按照建筑防火规范要求保证供给足够的水量和水压。
参考答案：对
用所给动词的适当形式填空。
1. Let my brother _______ (help) you.
2. Look! Jeff with his friends _______ (play) basketball happily on the playground.
3. Is it fine today? No, it's _______ (cloud).
4. How many _______ (umbrella) can you see in the shop?
5. She wants _______ (drink) a cup of coffee.
6. There are a lot of _______ (cloudy) in the sky at the moment.
7. My pen pal is an _______ (America) girl.
吸附作用只能在吸附剂的（）上，包括吸附剂的内表面和外表面。
A、整体
B、表面
C、能力
D、作用
playground.