一项砌砖工程,在编制计划计算其分项工程的持续时间时,应采用的方法是()。
A.定额计算法
B.三时估计法
C.抽样法
D.三结合法
参考答案:A
My suggestion is ()we should have mercy ()these homeless children and offer them some help.
A.that; on
B.what; to
C.which; for
D.that; for