国务院管理节能工作的部门会同国务院有关部门制定电力、钢铁、有色金属、建材、石油加工、化工、煤炭等主要耗能行业的节能技术政策,推动企业节能技术改造。
参考答案:对
两种材料界面上的反射因子大小主要取决于声波穿过界面时的什么变化
A.声阻抗B.声速C.密度D.探头频率E.与上述各项无关
句子翻译:根据中文提示,完成句子。
1. Don't _______ (打开) the radio, the baby is sleeping.
2. Please _______ (把牛奶倒进果汁机中).
3. If you want to make a fruit salad, please _______ (切碎) the fruit first.
4. _______ (多少酸奶) do they need?
5. They lived there _______ (大约5年).
6. Add some mayonnaise and _______ (把所有的原料混合在一起).
7. What is _______ (学英语的正确方法)
8. Do you know how to make chicken sandwiches, and turkey sandwiches,
please write down the _______(说明)
9. First, put _______ (一些调味品) on a slice of bread.
10. They needed _______ (两茶匙糖) just now.