描述日负荷曲线波动程度的指标有()。
A.峰谷差
B.最大负荷
C.负荷率
D.最小负荷
参考答案:A
用所给词的适当形式或按要求填空。
1. I'm afraid I have _______ (not) time to play with you.
2. He'd like a hamburger and some ________ (fish).
3. Would you like something _______ (drink)?
4. Help ________ (yourself) to some coffee, kids.
5. I can two _______ (woman ) under that big tree.
燃气轮机燃烧室通常采用()将燃料喷散成由大量小直径的油滴所组成的(),由于总的表面积大为(),很快吸热汽化并与空气混合形成()。