化工生产过程的“三废”是指（）
A、废水、废气、废设备
B、废管道、废水、废气
C、废管道、废设备、废气
D、废水、废气、废渣
参考答案：D
数轴上与原点相距5个单位长度的点表示的数是（ ）。
用所给单词的适当形式填空.
1. Computers are _____ (use) inventions and becoming more popular.
2. Could you tell me where I can _____ (change) money.
3. You may take the elevator to the _ (two) floor. She is in the office there.
4. Maybe there's someone_____ (call) you just outside your office.
5. The article is very _____ (organize), and it's worth read ing.
