人造花不受（）的限制，长久陈设也不变形。
A.人为破坏
B.风吹雨淋
C.季节和空间
D.高温日晒
参考答案：C
Too many hotels have been built and this has ________ prices, making holidays cheaper.[ ]
A. cut short
B. cut out
C. cut off
D. cut down
对一级负荷的供电要求有哪些？
