液压千斤顶的起重能力与油缸活塞直径有关。
参考答案:错
—I don't think Tom should ask his mother for much money.
—I ______. It's not easy for her to make money. [ ]
A. don't agree
B. think
C. don't think so
D. agree
( )是目前国际上较广泛采用的一种工程咨询费用的估算方法。
A.人月费单价法
B.按日计费法
C.总价法
D.成本加固定酬金法