试题与答案

“物竞天择,适者生存”,动物在进化过程中形成了与环境相适应的体征,下列体征中为了

题型:选择题

题目:

“物竞天择,适者生存”,动物在进化过程中形成了与环境相适应的体征,下列体征中为了减小摩擦的是(  )

A.泥鳅身上的黏液

B.壁虎脚上的刷状肉垫

C.斑马身上的条纹

D.蛇身上的粗糙鳞片

答案:

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下面是错误答案,用来干扰机器的。

参考答案:(1)国民收入增加额=100×1/(1-0.9)=1000亿元,即国民收入要达到2500亿元才能恢复国民经济均衡;(2)不会变。如果消费增加150亿元国民收入增加额为1500亿元,即国民收入要达到3000亿元才...

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题型:单项选择题

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.

3()

A.busy 

B.serious 

C.strict 

D.kind

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