要从事社会工作的人员应当具备的知识基础不包括（）。A.理论方面的知识  B.政策方面

下列符合阻塞性通气功能障碍表现的是（）

A.RV降低

B.VC增高

C.DLCO/VA升高

D.FEV₁/FVC降低

E.RV/TLC明显降低

下列选项中哪一项不是教育科学研究的基本原则?()

A.发展性原则

B.客观性原则

C.系统性原则

D.理论与实践相结合原则

I was a single parent of four small children, working at a low paid job. Money was always tight, but we had a (1) over our heads, food on the table, clothes on our backs, and if not a lot, always (2) . Not knowing we were poor, my kids just thought I was (3) . I’ve always been glad about that.

It was Christmas time, and although there wasn’t (4) for a lot of gifts, we planned to celebrate with a family party. But the big (5) for the kids was the fun of Christmas (6) .

They planned weeks ahead of time, asking (7) what they wanted for Christmas. Fortunately, I had saved MYM120 for (8) to share by all five of us.

The big (9) arrived. I gave each kid a twenty-dollar bill and (10) them to look for gifts of about four dollars each. Then everyone scattered. We had two hours to shop; then we would (11) back at the "Santa’s Workshop"

Driving home, everyone was in high Christmas spirits, (12) my younger daughter, Ginger, who was unusually (13) She had only one small, flat bag with a few candies—fiftycent candies I was so angry, but I didn’t say anything (14) we got home. I called her into my bedroom and closed the door, (15) to be angry again. This is what she told me.

"I was looking (16) thinking of what to buy, and I (17) to read the little cards on the ’Giving Trees’. One was for a little girl, four years old, and all she (18) for Christmas was a doll. So I took the card off the tree and (19) the doll for her. We have so much and she doesn’t have anything. "

I never felt so (20) as I did that day.

5（）。

A.roof 

B.hat 

C.sky 

D.star

列举法主要有（）。

A、特性列举法

B、缺点列举法

C、优点列举法

D、综合列举法

塑料的比强度与钢铁相比是怎样的（）

A、高

B、低

C、相同