会计法律制度不仅要求调整会计人员的外在行为，还要调整会计人员内在的精神世界，其调节的

某公司每年需消耗A材料36吨，每吨材料年存储成本为30元，平均每次进货费用为240元。根据经济订货批量模型，该公司购进A材料的经济订货批量是______。

A．6吨
B．12吨
C．18吨
D．24吨

商业智能(BI)的核心技术是逐渐成熟的数据仓库(DW)和 (4) 。

A．联机呼叫技术
B．数据整理(ODS)技术
C．联机事务处理(OLTP)技术
D．数据挖掘(DM)技术

Questions 9-13

·You will hearfive people giving reasons why children learn their mother tongue so well.
·Before you listen, read the list of statements, five of which are summaries of what they were saying.
·Then listen carefully and match the statements (A-F) with the people who said them (9-13) respectively.
·There is one extra statement that you don’t need to use. You will hear the passage twice.
9. Maggie: ______

• A. The time of their learning the mother tongue is the most
  favorable of all.
  10. Cherry: ______
• B. Children hear their native language spoken always in its
  genuine form.
  11. Mike: ______
• C. Children have private lessons all the time to learn their mother
  tongue.
  12. Hazel: ______
• D. Children hear their native language spoken in all possible
  situations.
  13. Jody: ______
• E. Children have special teachers to teach them.
• F. Children have flexible organs and sensitive ear.

液压系统中，常用的方向控制阀有（）。

A.换向阀

B.节流阀

C.减压阀

D.单向阀

什么是混凝土的自然养护法？有哪些具体的方法和要求？如何控制混凝土的模板拆除时的强度？