问题 单项选择题

已知某单层工业厂房的I形截面边柱,有吊车,从基础顶面算起下柱高6.7m,柱的控制内力N=853.5kN,M=352.5kN·m,截面尺寸如图2-24所示。混凝土强度等级为C35,采用HRB335钢筋,对称配筋。安全等级为二级,环境类别为二类。

该柱截面的界限受压区高度xb最接近于()mm。

A.360

B.428

C.497

D.544

答案

参考答案:A

解析:

写作题
完形填空

SECTION B

Directions: For each blank in the following passage there are four words or phrases marked A, B, C, and D. Fill in each blank with the word or phrase that best fits the context.

It was early spring. The sun was strong and warm. I went over the hillside fields behind my village,   36   buntings and linnets, the birds I loved most.

I turned along a bush between two fields where I had seen the birds before, but on this fine day almost the first birds that I saw were winter visitors. I was  37   not to see a bunting straightaway, but I went on, stopping occasionally to look at the black-thorn (黑刺李) flowers in the bush, and   38  I did hear a bunting singing. Or was it? Was I not perhaps turning a note of skylark (云雀) song into that of the song I was hoping to hear?

But the bunting’s songwas prettyclear, andwithin afew minutesI was proved

  39 . The song was coming from the bush, and as I approached   40   I saw the brown bird resting in a small tree. It opened its mouth, and   41  once more. Then it flew off. It was the only one I saw that day, but at least I had found one of the birds I had   42  .

It was not until I was on my way back home that I caught sight of some    43  . I saw five of them gathering on the ground when I was just coming back beside the

   44   where I had found the bunting. As I came nearer, they flew up, spreading their tails so that their white edges    45   to look like a white fan in the sky. Then, to my

   46  , some big pigeons suddenly came flying and joined the linnets. A moment later they had all    47 but I had fulfilled my hopes for the day.

36.A. looking at     B. looking for C. looking up  D. looking after

37.A. disappointed B. dismissed   C. dissatisfied D. disturbed

38.A. directly B. gradually   C. suddenly    D. immediately

39.A. proper   B. right C. useful        D. true

40.A. sadly     B. hurriedly   C. proudly     D. quietly

41.A. danced  B. ate      C. sang    D. shouted

42.A. observed      B. noticed       C. expected     D. described

43.A. linnets B. skylarks     C. pigeons     D. buntings

44.A. bush     B. road   C. grass   D. black-thorn

45.A. widened       B. enlarged     C. lengthened  D. expanded

46.A. knowledge   B. pleasure     C. amusement       D. honour

47.A. gathered       B. lost     C. missed       D. gone