国外建筑安装工程费用构成中的材料费不包含的费用。
A.税金
B.材料预涨费
C.周转材料摊销费
D.材料采购保管费
参考答案:C
—Have you got any idea why Mother asks for me?
—She wants you to________ your staying up last night.
A.search for
B.account for
C.wait for
D.say for
电流继电器对电动机过载或短路的保护原理是什么?