进行成本控制的基础是（）。
A.定额制定
B.计量标准化
C.价格标准化
D.制度建设
参考答案：A
There are many new bikes ____ for you in the shop. I think you can buy one that you like most.[ ]
A. to be chosen
B. to choose from
C. to choose
D. for choosing
发电机的短路特性曲线是一条（）线.
