《煤炭法》于（）起施行。A、1993.5.1 B、2000.12.1 C、2002.11

根据句意及首字母提示完成单词,使句意完整。

1. I'd like to b ________ a football for my son.

2. She can't go to s ________ at night at the moment.

3. Mr. Dai is the h ________ of our school.

4. Can you m ________ model planes, David?

5. My grandparents are b ________ teachers.

6. There are a lot of good books in our school l________.

7. Do we have enough f________ in the fridge (电冰箱)?

8. You cannot buy a new pen from the shop. It is c________ now.

9. Can I a________ you a question, Eddie?

10. Sorry, I can't play basketball with you today. I am very b________.

施工承包人为了避免停工待料，不得不以较高价格紧急采购因供货方不能供应部分的货物而受到的价差损失应由( )承担。

A．施工承包人
B．建设单位
C．供货方
D．采购方

心理学研究有四个原则，它们是客观性原则、发展性原则、系统性原则和______原则。

对检察机关作出的不起诉决定的有哪些制约机制？

可促进叶绿素的形成的元素是（）

A.K.Ca

B.K.Fe

C.P.K

D.Fe.P