已知（a2+b2）2-（a2+b2）-6=0，则a2+b2=______．

根据句意及首字母或汉语提示完成单词

1. The sweater is too large.  It doesn't f____ my father.

2. You should not feel under p____.You  should relax yourself.

3. We go to work every day e____ Sunday.

4. Teenagers should have more______ （自由）,and they should have their own ideas.

5. My job doesn't____（包含）making coffee  for the boss.

6. They are ________(plan) how to spend the summer holiday.

7. I couldn't believe my ear when my teacher  told me I ____(fail) the exam.

8. That news_________. (surprise) me a lot, because I didn't think he was careful.

9. Their _____(push) parents always let them   take part in so many after-school clubs.

10. You should be ______ (friend) if you want to  be popular.

企业社会工作的功能是社会工作的一般功能在企业这一具体领域的展开，它包括（）。

A.提供物质帮助，协助困难职工摆脱困境

B.为企业职工提供心理疏导和支持

C.协调内外关系，增强企业组织的凝聚力

D.维护职工合法权益

E.因地制宜开展和设计有特色的服务项目

流水作业施工中，造成专业队窝工是由于出现( )。

A．31=N'

B．M＞N'

C．M＜N'

D．M=N

地垒

预测煤巷掘进工作面的突出危险性都用什么指标法？