表示压力表的误差是（）形式。A、引用误差 B、相对误差 C、偶然误差 D、绝对误差

若干个乒乓球有1个是次品，它与其他乒乓球质量不同，请用一架天平，设法找出这个次品球。   

（1）9个乒乓球中，已知次品球比正品球重，你要称几次才能保证找到这个次品球？ 如何称？    

（2）9个乒乓球中，不知道这个次品球比正品球重还是轻，你认为需要称几次，一定可以找出这个次品球？ 

第二节完形填空（共20小题：每小题1分，满分20分）

阅读下面短文，掌握其大意，然后从36—55各题所给的四个选项（A、B、C和D）中，选出最佳选项，并在答题卡上将该项涂黑。

I believe in miracles（奇迹）because I‘ve seen so many of them.One day, a patient was referred to me who was one hundred and two years old.“There’s a   36   in my upper jaw ,”she said.“I told my own dentist it’s nothing,but he   37   I come to see you”

Her eight-year-old son accompanied her.He would   38   to add something .but she stopped him.She wanted to tell everything herself.I found a large cancer that spread over much of the  39  of her mouth.A careful examination later   40  that it was a particularly bad sort of cancer.

During her next appointment，I explained to her the   41   of the problem.She clasped my hand in hers and said,“I know you’re worried about me,but I’m just   42   .”

I thought otherwise.After considerable   43   on my part,and kindness on her part because she wanted to   44   me ,she agreed to have me refer her to a cancer surgeon.She saw him,but as I expected,  45  treatment.

About six months later she returned to my office,still energetic and   46  .

“How are you?”I asked.

“I’m just fine ,honey，”she responded   47   high spirits.“When can I get stared on fixing my dentures（假牙）?”

Surprised to see her at all,Ianswered   48  ,“Let me take a look at your mouth and we’ll see about it.”

I couldn’t believe my eyes.The cancer that had  49  nearly the entire roof of her mouth was gone-only one small area of redness  50  .

I had read of such things happening.but had  51  seen them with my own eyes.That was my first miracle.Since then I’ve seen many others,because they keep getting  52  to see.In fact,miracles are daily events for me now.And people are miracles, 53  through them we have a chance to know ourselves and to  54  the miracles of one another.

Since my first miracle,I’ve come to understand that the time and place for a miracle is  55  we choose to find it. 

36.A.cut                  B.pain                C.wound           D.cancer

37. A.declared              B.suspected           C.promised         D.insisted

38. A.refuse               B.continue           C.attempt          D.manage

39. A.roof                 B.coiner              C.bottom          D.surface

40. A.confirmed            B.convinced           C.considered       D.concluded

41. A.possibility            B.importance          C.seriousness       D.resolution

42.A.old                  B.sick                C.fine             D.glad

43.A.permission            B.support             C.approval         D.effort

44.A.persuade              B.please              C.encourage        D.astonish

45.A.declined              B.provided            C.received          D.required

46.A.healthy               B.elegant             C.optimistic        D.humorous

47.A.to                   B.in                  C.with             D.by

48.A.worriedly            B.confusedly           C.patiently         D.confidently

49.A.covered              B.reached              C.spread           D.grown

50.A.cured                B.faded                C.expanded        D.remained

51.A.ever                 B.also                C.never           D.already

52.A.easier                B.rarer                 C.happier         D.closer

53.A.or                   B.so                   C.yet             D.for

54.A.read                 B.make                 C.keep           D.see

55.A.whatever             B.wherever              C.whoever        D.whichever

案例中，乐华公司采用的促销方式属于（）。

A.销售促进

B.广告

C.人员推销

D.公共宣传

社会主义国家公安机关与剥削阶级国家警察机关的区别主要有( )。

A．两种警察所维护的阶级利益不同
B．两种警察在专政对象上不同
C．两种警察在专政的目的上不同
D．两种警察与人民群众的关系不同

赌气心理会导致下列哪些行为？（） 

A.交通拥堵时有序排队

B.仔细观察

C.强行超车

D.不让加塞车辆