试题与答案

已知xi∈[0，10]（i=1，2，…，10），x1，x2，…，x10的平均数为

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题型：选择题

题目：

已知xi∈[0，10]（i=1，2，…，10），x1，x2，…，x10的平均数为7.5，当(x1-10)2+(x2-10)2+…+(x10-10)2取得最大值时，x1，x2，…，x10这十个数中等于0的数的个数为（　　）
A．0B．1C．2D．3

答案：

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题型：完形填空

完形填空（共20小题；每小题1.5分，满分30分）

Years ago, in a small fishing village in Holland, a young boy taught the world about the

rewards of unselfish service.

Because the entire village lived on fishing, a volunteer rescue team was needed in case of emergency. One night, the winds   31  , the clouds burst and a strong storm overturned a fishing boat at sea. The crew in trouble   32  the SOS. The captain of the rescue rowboat team   33  the alarm and the villagers   34  in the town square overlooking the sea. When the team started their rowboat fought their way through the wild waves, the villagers waited   35  on the beach, holding lamps to   36  the way back.

An hour later, the rescue boat reappeared through the fog and the   37  villagers ran to greet them. Falling   38  on the sand, the volunteers reported that the rescue boat could not hold any more   39   and they had to leave one man behind. Even one more passenger would have surely   40  the rescue boat and all would have been lost.

   41  , the captain called for another volunteer team to   42  the survivor. Sixteen

-year-old Hans stepped forward. His mother grabbed his arm, crying, "please don't go. Your father   43  in a shipwreck  (船只失事) 10 years ago and your elder brother, Paul, has been lost　　44  for three weeks. Hans, you are all I have left."

Hans replied, "Mother, I have to go.    45  everyone said I can't go, let someone else do it? Mother, this time I have to do my duty. When the call for service   46 , we all need to take our turn and do our part. Hans kissed his mother, joined the team and   47  into the night. "

Another hour passed, which seemed to Hans' mother like a century.    48   the rescue boat dashed through the fog with Hans standing up in the bow.    49  his hands, the captain called, "did you find the lost man?"    50  able to control himself, Hans excitedly cried back, "Yes, we found him. Tell my mother it's my elder brother, Paul!"

31. A. stilled                    B. screamed              C. stopped            D. calmed

32. A. set about          B. sent out         C. came up with   D. took over

33. A. sounded          B. set             C. took             D. made

34. A. gathered          B. followed         C. fought          D. struggled

35. A. nervously         B. angrily          C. fearfully        D. happily

36. A. hope              B. light            C. expect            D. try

37. A. promising         B. hoping          C. cheering           D. standing

38. A. uncomfortable     B. exhausted       C. disturbed             D. painful

39. A. villagers          B. sailors          C. captains            D. passengers

40. A. pushed           B. pulled          C. overturned          D. settled

41. A. Anxiously         B. Strangely        C. Unexpectedly      D. Doubtfully

42. A. look after         B. look for         C. lookout           D. look on

43. A. died              B. pulled          C. went               D. interrupted

44. A. in the fire         B. at sea           C. on strike          D. in the war

45. A. How about         B. What for        C. What if          D. What with

46. A. comes                    B. goes                     C. flies                     D. climbs

47. A. appeared          B. disappeared     C. came                 D. went

48. A. Therefore         B. Firstly          C. when              D. Finally

49. A. Making           B. Keeping         C. Showing              D. Cupping

50. A. Hardly                   B. Only                    C. Seldom                 D. Always
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