某建设项目需要建筑材料每年30吨,已知该材料的单价为15万元/吨,该材料的一次采购费用为1000元,年度保管费为0.4%,则对该材料的一次经济采购批量为多少吨?
参考答案:
从A、B、C、D 四个选项中,选出与所给句子画线部分意思相同或相近并能替代的那一项,然后填写在括号里。
1. Yesterday he got a letter from his father. [ ]
A. heard of
B. heard about
C. heard a letter from
D. received a letter from
2. —Are you happy to have two-month summer holidays?
—Sure. We can relax ourselves and do many things we like. [ ]
A. two months
B. two month
C. two months
D. two month's
3. Would you like a cold drink rather than coffee? [ ]
A. would than
B. would rather
C. instead
D. instead of
4. I'm sorry she isn't here right now. [ ]
A. then
B. at the moment
C. just now
D. at this time
5. When you cross the road, be careful.[ ]
A. across
B. go through
C. go cross
D. walk across
属于现存性护理诊断的是()。
A.发热
B.母乳喂养有效
C.社区应对无效
D.有照顾者紧张的危险
E.潜在并发症:心律失常