在水头和功率相同的条件下,要使机组转速愈高,机组尺寸较小,厂房尺寸减小,降低电站投资

题型:单项选择题

问题:

在水头和功率相同的条件下,要使机组转速愈高,机组尺寸较小,厂房尺寸减小,降低电站投资,则机组的比转速应选择()。

A.愈小

B.愈大

C.不变值

D.任意值

考点:水利工程水电站水电站题库
题型:单项选择题

某企业按年利率10%向银行借款200万元,银行要求维持贷款限额60%的补偿性余额,那么企业实际承担的利率为( )。

A.10%

B.12.75%

C.12.5%

D.25%

题型:单项选择题

已知元素A、B、C、D和E的原子序数依次增大。A、B、C、D四种元素核电荷数均小于20,A、B同主族;B、C、D元素的基态原子具有相同的能层数,它们的基态原子中p能级上未成对电子数分别为1、3、1;E是周期表中(除放射性元素外)第一电离能最小的元素。回答下列问题:

(1)写出下列元素的符号:A       、E       

(2)C元素的价电子排布图为:                            ;

该排布遵循的原理主要有:                                        (答完整得分)。

(3)C、D元素形成的化合物主要有:          (填化学式,答完整得分);其中相对分子质量较小的分子为      分子(填“极性”或“非极性”),该分子的空间构型为        ,中心原子的杂化方式是       

(4)化合物BD3的熔点190℃、沸点182.7℃,那么BD3的晶体类型为     ;事实上,在BD3的化合物中往往以B2D6的形式存在,该形式的存在是由于     形成的。(选填“氢键”、“范德华力”、“离子键”、“配位键”)

(5)下图为几种晶胞(或晶胞的1/8)示意图,其中代表两种不同的粒子。E与D形成的化合物的晶胞是下列中的  (填序号),在该晶胞中阳离子的配位数为  

题型:单项选择题

第二节:完形填空(共20小题;每小题1分,满分20分)

请认真阅读下面短文,从短文后各题所给的A、B、C、D四个选项中,选出最佳选项,并在答题卡上将该项涂黑。

Before India gained independence (独立), a few young men from the villages wanted to free India from the foreign rule; they wanted the British to quit India. They needed material wealth to  36  the British out of India, so they started collecting  37  in the Indian villages.

One day, they got encouraged to collect  38   things as well. They went from door to door carrying a huge bag, which gradually was  39  with money and gifts. As they went, a one-legged beggar kept  40  them. The young men did not mind.

At the  41  of the day, they entered a house to see  42  they had collected. The beggar also wanted to enter, but since he was not a member of the group, they did not  43  him in. The beggar said to them: “I walked such a  44  distance right behind you. You want freedom; I also want freedom. India is not only your motherland. It is also my motherland.”

45 , the young men got mad and told the beggar to go away. Then one of the men felt  46  for him, so they decided to  47  him the things they had collected.  48  the beggar was looking at the gifts in their bag, most of them were showing no  49  for him. Then suddenly the beggar opened up the bag that he had been carrying. It  50  a few coins and some rice. He threw all the contents into their bag at once.

At the  51  of this, immediately all the members of the revolutionary group started dropping  52  of gratitude (感激), because he had  53  all that he had to their cause. On that day, they had gone to visit so many rich families, who had given them next to  54 ; but this beggar had given them everything that he had! They were deeply  55  by the beggar’s contribution.

36. A. drive                         B. grow                       C. help                        D. pick

37. A. food                          B. money                    C. papers                   D. seeds

38. A. military                    B. material                C. mysterious           D. cultural

39. A. tired                          B. satisfied                C. filled                       D. covered

40. A. following                  B. cheating                C. calling                    D. beating

41. A. beginning                B. end                         C. front                       D. middle

42. A. how                           B. what                       C. where                    D. when

43. A. stop                          B. drop                        C. allow                      D. promise

44. A. short                         B. near                        C. long                        D. little

45. A. At last                      B. At first             C. At a time               D. In that case

46. A. necessary                B. patient                            C. thankful                 D. sorry

47. A. trouble                     B. serve                      C. show                      D. excite

48. A. Since                         B. While                      C. If                              D. Although

49. A. interest                    B. courage                 C. respect                  D. disappointment

50. A. included                   B. consisted              C. held                        D. contained

51. A. thought                    B. sight                       C. sound                     D. moment

52. A. laughter                            B. difference             C. truth                       D. tears

53. A. taken                        B. given                      C. wasted                            D. lost

54. A. something               B. nothing                  C. everything            D. anything

55. A. moved                      B. removed                C. excited                   D. surprised

题型:单项选择题

以课税对象的价格或金额为课税标准的税收是()。

A.从价税

B.从量税

C.价内税

D.价外税

题型:单项选择题

以下哪些需求使用OpenType特性没有办法实现()

A、让当前文档中冒号与中文字符间间距都增大

B、自动转化分数

C、在竖排文本时自动旋转罗马字符

D、连写临近字符

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