血中Hb含量低于多少时，即使重度缺氧，亦难发现发绀（）。 A. B. C. D. E

第二节．完形填空（共20小题；每小题1.5分，满分30分）

阅读下面短文，从短文后所给各题的四个选项（A、B、C和D）中，选出可以填入空白处的最佳选项，并在答题卡上将该项涂黑。

On a cold November afternoon, my mother and I were walking home from a pizza store. We were dressed warmly and    31  with the rented video we had been dying to watch, I was feeling a little   32  , as I was carrying our shopping bags of snacks and the   33  .They were so heavy that I decided to   34   some things. So I started to walk towards the garbage can   35   I noticed a poor man walking his bike out of the restaurant in front of us. He 36  a paper bag with his dirty hand. He headed over to another nearby garbage can and started _37  it.

I suddenly felt very 38 because I was about to do away with a new drink just  39 it was heavy. I knew this man would take all he could  40  , so I walked up to him and  41 the drink and some snacks to him. The man looked up 42  and took what I gave him. A huge smile spread  43  his face and this caused me to feel quite  44  . I felt like I  45 be happier with myself, but then he said, “This is my son’s lucky day!”

With that, he  46  me happily and started off on his bike. I even heard him   47   a song as he rode away. I got a warm feeling inside and I knew I had done something good, for the man and his family. I now understand what is   48   by the saying “Giving is getting”.

Since then, every time I have the   49   to do something nice, the image of the man’s happiness caused by my small gift appears in my mind. This is the  50   of charity.

31. A. equipped            B. covered            C. done             D. offered

32. A. upset               B. happy              C. tired            D. excited

33. A. video              B. books              C. pizza            D. clothes

34. A. send off            B. throw away         C. put away          D send out

35. A. after              B. when              C. before            D. while

36. A. owned             B. presented           C. held             D. sought

37. A. going into          B. finding out          C. looking through    D. working out

38. A. stupid             B. guilty              C. disappointed       D. happy

39. A. since              B. until               C. because           D. when

40. A. get                B. search             C. hear              D. see

41. A. dropped                  B. kept              C. turned             D. handed

42. A. sadly              B. coldly             C. thankfully         D. patiently

43. A. in                       B. across             C. by               D. through

44. A. regretful           B. satisfied            C. puzzled           D. curious

45. A. couldn’t                  B. shouldn’t         C. needn’t            D. mustn’t

46. A. smiled                   B. told               C. saw              D. thanked

47. A. whistling                 B. whispering         C. listening           D. making

48. A. referred                  B. said               C. meant                   D. spoken

49. A. time                     B. chance             C. idea             D. effort

50. A. power             B. effect              C. result             D. mystery

简述不变资本和可变资本的划分及其意义。

菱形交叉由两组相同角度的钝角辙叉和两组相同角度的锐角辙叉组成。

关节附近骨折，骨膜剥离形成较大骨膜下血肿、机化、钙化后可致

A．脂肪栓塞
B．缺血性骨坏死
C．缺血性肌挛缩
D．创伤性关节炎
E．骨化性肌炎(损伤性骨化)

线路中断，列车不能继续运行时，列车应对旅客车票如何处理？