管型母线放置采取哪些措施?
参考答案:管型母线放置应采取防止滚动和隔离警示的措施。
The factory used 65 percent of the raw materials, the rest of which ________ saved for other purposes.
A.is
B.are
C.was
D.were
计算题:一块土地共10亩,假定每亩的年平均收益为500元,在年利率为10%的条件下,出售这块土地价格应是多少元?