男，8岁。两下中切牙萌出2／3，两下侧切牙萌出1／3，远中面与乳尖牙近中面重叠2mm

氯乙烯可引起的法定职业肿瘤是

A．肝血管肉瘤
B．肺癌
C．皮肤癌
D．鼻咽癌
E．喉癌

在我国，多年来多数地区细菌性痢疾流行的致病菌群是（）

A.志贺菌属A群

B.志贺菌属B群

C.志贺菌属C群

D.志贺菌属D群

E.以上都不是

在AgNO₃和Cu（NO₃）₂的混合溶液中，加入一定量铁粉，充分反应后过滤，

（1）若在滤液中加入稀HCl，出现白色沉淀，则滤纸上的物质一定不含有______．

（2）若在滤液中插入铁片，取出后发现无任何变化，则滤纸上一定有______，可能有______．

（3）若将滤纸上的固体放入稀HCl中，生成无色可燃性气体，则滤纸上一定有______，滤液中一定含有的溶质是______．

Laugh and Smile Your Way to Health

How much do you laugh and smile during the day? Do you take your life and your illness or injury so   36    that there is no room for joy to fill you? Want a totally free, simple way to increase your    37    and your health with no medicine needed? Then laughing and smiling is   38  to you

So laugh your way to happiness.   39    it takes to put a smile on your face is what you should be doing.  

Research shows that laughing can increase the immune system,   40    the body to stay disease free and fight colds and the flu.

If you are facing an illness , having a positive life opinion and a   41    of humor will keep your body open to healing. If you are healthy, laughing will help to make sure you stay that way, and can    42    enjoyment to your work and home life and   43   your daily stress.

Certainly, it can be   44   to keep a positive opinion of life all the time. Simply taking the time to   45   on the positive and treat for the good things    46   in your life can help   47   , but if you are struggling with negative emotions that you just can’t seem to    48    , there are tools that can help.

There are so many things out there to smile about and   49  you have to do is find   50   . Practice looking for the bright   51   of every situation. Avoid the negative：don't   52    yourself with your own problems—or    53    others for their "shortcomings." And don’t pay no attention to the joy in everyday things. Create your own "Laugh for Health"   54    —anything to add to your collection and to give you fresh materials that   55  to you.

36.A. proudly               B.seriously                   C.carefully                   D.freely

37. A.burdens               B.spirits                       C.loads                         D.values

38. A.beneficial             B.changeable                C.suitable                     D.harmful

39. A.However              B.Whenever                  C.Whatever                  D.Whichever

40.A.helping            B.making                            C.letting                       D.causing

41. A.taste                   B.sense                         C.knowledge                 D.joy

42. A.adjust                  B.adapt                        C.apply                        D.add

43. A.improve              B.arise                         C.cancel                       D.reduce

44. A.hard                    B.awful                        C.energetic                   D.helpful

45. A.concentrate          B.put                           C.focus                        D.interview

46. A.carefully                B.thankfully                 C.particularly                D.differently

47..A.remarkably          B.accidentally               C.frequently                 D.purposefully

48.A.seek                  B.stress                        C.accept                       D. overcome

49. A.all                       B.that                           C.how                          D.why

50. A.it                        B.that                           C.this                           D.one

51. A.side                        B.plan                         C.aspect                  D.future

52.A.depend                 B.abandon                    C.load                          D.ban

53.A.praise                   B.miss                          C.approve                     D. blame

54. A.ambition               B.summary                   C.message                    D.collection

55.A. appeal                 B.apply                        C.center                       D.assume

下列有关食品安全的说法错误的是（）

A.食品及食品相关产品中的农药残留没有限量规定

B.食品首先必须无毒、无害

C.食品应当符合各自的营养要求

D.食品对人体健康不会造成任何急性、亚急性或者慢性危害