氟化物预防龋病的途径主要是（）。 A.全身作用 B.局部作用 C.牙萌出前通过局部作

简述社区横向格局的特点。

膝内翻或膝外翻畸形多见于（）

A.佝偻病

B.脊髓灰质炎后遗症

C.大骨节病

D.腓神经受损

E.膝关节结核

废旧计算机的某些部件含有Zn，Fe、Cu、Ag、Pt（铂）、Au（金）等金属，经物理方法初步处理后，与足量稀盐酸充分反应，然后过滤，剩余的固体中不应有的金属是（　　）

A．Cu、Ag

B．Fe、Zn

C．Pt、Cu

D．Ag、Au

SECTION B (18 points)

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

People have always enjoyed laughing, and there has always been humor. One of the most well-known and well-loved types of comedy is called   36 . Stand-up comedy is special   37   the comedian is right there in front of the audience and may talk directly to audience members. A stand-up comedian may make fun of an audience member, or he or she might decide to tell different jokes   38  the reactions of an audience.

There are different styles of stand-up comedy. The main four are observational(观察评论类), prop(道具使用类), physical(形体动作类) and impressionist(印象模仿类) . In observational comedy, the comedian makes jokes about humorous things he or she    39   in everyday life. If you hear a comedian telling jokes about the way   40   people behave when they queue up in lines, or asking why it only rains when you forget your   41 , you are listening to an observational comedian. Prop comedians use things, called   42 , to tell their jokes. The jokes are not funny if you cannot see the prop. It is a type of visual humor. If a comedian points to a   43   tennis game and says, “I’ve been playing tennis   44  for a month. I don’t understand why I am not losing   45 !”, he or she is using the computer as a prop. Physical comedians use their bodies to make jokes. They have been   46  chairs, walking into doors, and falling down on stage for years. The last style is called   47 . These comedians act or speak like a well-known person. This is called doing an impression of the person.

36. A. prop           B. comedy       C. stand-up            D. comedian

37. A. because of               B. because         C. although          D. as if

38. A. in honor of         B. in order to     C. in case of           D. in response to

39. A. watch           B. observe        C. see                D. find

40. A. /                   B. in that          C. how               D. which

41. A. coat                B. wallet          C. umbrella           D. sunglasses

42. A. queues            B. humor        C. impression        D. props

43. A. funny           B. boring        C. computer                D. new

44. A. every day       B. everyday      C. some times        D. sometimes

45. A. weigh         B. weight          C. overweight         D. weight-loss

46. A. running after          B. fighting against C. competing with      D. tripping over

47. A. impressionist      B. prop               C. physical            D. observational

基本建设