试题与答案

在进行药物疗效分析时,下列哪项是正确的()。 A.因为是临床试验,故不需要对照组

题型:单项选择题

题目:

在进行药物疗效分析时,下列哪项是正确的()。

A.因为是临床试验,故不需要对照组

B.试验组、对照组均只选典型患者

C.试验组、对照组都应选择有代表性者,并且两组是均衡可比的

D.试验组应选择较轻的患者

E.对照组应选择较重的患者

答案:

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参考答案:C解析:①电解质:抗原与抗体发生特异性结合后,虽由亲水胶体变为疏水胶体,若溶液中无电解质参加,仍不出现可见反应。②酸碱度:抗原抗体反应必须在合适的pH环境中进行。蛋白质具有两性电离性质,因此...

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阅读下面短文,掌握其大意,然后从A、B、C、D四个选项中,选出可以填入空白处的最佳选项。(共20小题;每小题1.5分,满分30分)

We rented our upstairs rooms to the out-of-town patients of Johns Hopkins Hospital. One evening, a bad-looking man, who was even shorter than my 8-year-old son, knocked at the door;  36 , his voice was pleasant as he said, “Good  37 . I come to see if you’ve a room. I came for (a)  38  this morning from the eastern shore”.

He told me he’d been  39  a room since noon but with no  40 ; no one seemed to have one. “I guess it’s my  41  face…” I know why they  42  him away! It was clear that they would  43  roomers by putting up such people. For a moment, I  44 , but his next words convinced me, “I could sleep in this rocking chair on the porch(门廊). My  45  leaves early in the morning.” I told him we would find him a bed, but to rest on the porch.

He told me he fished for a living to  46  his daughter, her five children and her husband, who was  47  in a terrible accident so that he couldn’t work. He didn’t tell it by way of  48 ; in fact, he was grateful that no pain  49  his disease, which was apparently a form of skin cancer. He thanked God for giving him the  50  to keep going. The next morning, the bed linen was  51  folded and the little man thanked me and waited for his bus.

Three months later when I almost  52  the man, we received packages in the  53 , with fish and oysters in it and a note  54 , “Thank you for having kept my father a night. He just  55  because of skin cancer. Before his death, he asked me to post these as gifts. Thank you again, sir.” All this happened long ago — and now, I imagined, in God’s garden, how tall this lovely soul must stand.

36. A. otherwise    B. though      C. however    D. unless

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38. A. treatment    B. travel       C. meeting     D. prayer

39. A. dealing with    B. dreaming of     C. hunting for     D. living with

40. A. money      B. patience      C. success     D. help

41. A. serious      B. terrible       C. happy       D. long

42. A. took        B. sent          C. drove       D. turned

43. A. lose        B. discourage    C. impress      D. attract

44. A. doubted     B. believed      C. wondered    D. hesitated

45. A. doctor       B. bus         C. daughter     D. graduation

46. A. educate      B. support      C. encourage     D. protect

47. A. unfriendly     B. ugly       C. sad          D. disabled

48. A. complaint     B. inspiration    C. humor      D. joke

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52. A. forgot        B. missed         C. called          D. forgave

53. A. hospital       B. envelope       C. air             D. mail

54. A. reading       B. writing         C. speaking        D. drawing

55. A. gave up      B. stayed out       C. passed away     D. lay down

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