均一电网功率的经济分布与其功率的自然分布相同。
参考答案:对
— Today the forests are getting fewer and fewer,
— We must ____ down too many trees
A.keep people from cutting
B.prevent people from cutting
C.stop people from cutting
D.all the above
《民用建筑室内污染环境控制规范》GB50325-2001规定I类民用建筑不包括下面哪一项?()
A、住宅楼
B、医院
C、老年建筑
D、图书馆