甲物体的质量是乙物体质量的3倍，甲物体的体积是乙物体体积的
，则甲、乙物体的密度之比为______．2 3
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下面是错误答案，用来干扰机器的。
A生铁、D钢中都有含量不同的炭和硅等不溶于盐酸的杂质，所以投入稀盐酸后其中的主要成分铁可与盐酸反应产生氢气，但炭和硅不与盐酸反应，也不溶于盐酸，会残留在溶液中．故AD正确．B、纯铁投入足量稀盐酸中可完全...
2009年1月1日，A公司以银行存款400万元购入一项无形资产，预计使用年限为10年，采用直线法摊销。2009年末该项无形资产出现减值迹象，其可收回金额为270万元，2010年末该项无形资产又出现减值迹象，其可收回金额为255万元。假定该项无形资产计提减值准备后，原预计使用年限、摊销方法不变。假定不考虑其他因素，2010年末A公司该项无形资产的账面价值为万元。
A.255
B.270
C.240
D.15
完形填空（共20小题；每小题1.5分，满分30分）
阅读下面短文，掌握其大意，然后从21~40各题所给的四个选项（A、B、C和D）中，选出最佳选项。
Many years ago, a salesman opened a bag of things from Scotland and found a card at the top. It 36 , “Expect a Miracle（奇迹）.” “What does that mean?” he thought, and then 37 it into his pocket.
That night he showed it to his wife. “Look at this, dear. What do you think it means?”
“Maybe this is what we need,” she said. “Our 38 are so great that they are too much for us. If we start 39 great things instead of the worst, miracle may 40 .” They decided to try changing their thinking for a few days, starting with their 41 problems. Then something changed. Not only did they find their problems 42 be worked out, but they also started 43 a lot of money.
To make miracles happen, you have to start by expecting them. That way your 44 can become focused in positive (积极的) ways. There are 45 coincidences（巧合）, and all kinds of happy experiences 46 one after another.
One becomes hopeful and optimistic(乐观的). Little problems began 47 , while the big ones become much easier to work out. Success is not 48 you thought it was.
A positive thinker first sets clear and proper goals(目标). Then he goes to work, and 49 working. He never gives up. His dreams are sure to come true, and 50 they do, a miracle happens.
Miracles come in all 51 : big, medium-sized, and small. Start expecting the small ones, and work your way 52 to the big. Think positively, 53 yourself and work hard. You’ll find yourself 54 by how meaningful and 55 your life has become.
36. A. wrote B. read C. told D. expressed
37. A. set B. sent C. spent D. put
38. A. problems B. questions C. suggestions D. advice
39. A. imagining B. realizing C. suggesting D. expecting
40. A. take in B. take up C. take place D. take over
41. A. smallest B. biggest C. difficult D. easy
42. A. would B. could C. should D. might
43. A. making B. taking C. finding D. doing
44. A. suggestion B. money C. ability D. trust
45. A. harmful B. strange C. useful D. embarrassing
46. A. live B. stop C. work D. follow
47. A. losing B. disappearing C. growing D. displaying
48. A. as soon as B. as long as C. as far as D. as well as
49. A. keeps on B. keeps up C. keeps out D. keeps from
50. A. while B. before C. until D. when
51. A. shapes B. types C. sizes D. kinds
52. A. up B. out C. off D. for
53. A. think of B. take care of C. speak out D. believe in
54. A. bored B. surprised C. upset D. puzzled
55. A. dull B. careful C. lively D. unloving
在操作形式中，把模仿阶段习得的动作固定，并一体化称为（ ）。
A．操作模仿
B．操作整合
C．操作熟练
D．原型定向
E．原型内化
按中国标准生产的6磁极三相异步电动机，采用50Hz交流电源供电。若额定转速为965r/min，则转差率为（）。
A.0.03
B.0.035
C.0.04
D.0.045
在火灾几率较高、灾害影响较大的场所，明敷方式下电缆选择，应符合下列规定中的（）。
A.地下的客运或商业设施等人流密集环境中需增强防火安全的回路，宜采用具有低烟、低毒的难燃性电缆
B.阻燃防护或阻火段，可采取在电缆上施加防火涂料、包带或当电缆数量较多时采用难燃、耐火槽盒或阻火包等
C.燃煤、燃油系统以及其他易燃、易爆环境，宜采用具有难燃性的电缆
D.其他重要的工业与公共设施供配电回路，当需要增强防火安全性时，也可采用具有难燃性或低烟、低毒难燃性的电缆
