品种法和分步法的最大区别在于().
参考答案:产品成本计算对象
Great ________ should be made to speed up higher education to meet the needs of industry and agriculture.
A.measures
B.goals
C.efforts
D.effects
消防车水泵出口压力可按HB=h+hd+H1-2估算进行,hd表示()压力损失。
(A)水枪
(B)水带
(C)水炮
(D)水泵