转点放样的几种情况有（）。A．在导线边上内插转点 B．在导线边的延长线上外插转点 C

反应3NO₂+H₂O→2HNO₃+X，推断X的化学式为（　　）

A．N₂

B．NO

C．N₂O₃

D．N₂O₅

1g NH₃含m个氢原子，则阿伏加德罗常数为（　　）

A．17m

B．3m

C．

D．

第二节完型填空（共20小题；每小题2分，满分40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

Some of you must have complained why there are so many English words that you have to memorize every day.   36  , do you know how many words the English language has exactly? Maybe ten thousand, one hundred thousand, or   37  one million!

Every 98 minutes, there is a new English word being   38  . Last time when words were being   39  to the language at this rate was during the   40   of William Shakespeare. The   41  popularity of English has   42   the most fertile (丰富的) period of word creation. About 1.53 billion people speak English as a   43 , a second or a business language. The Global Language Monitor,   44   in the state of Texas in the US, has been recording English word creation since 2003. Now, there are almost one million English words.

Words that are predicted to be the one millionth   45   “defollow”, “defriend”, “noob”, and “greenwashing”. “Defollow” and “defriend” are Internet words,   46   what users do with a person they do not wish to   47  in touch with on the Internet. “Noob” is an offending name for someone new   48   a particular task or community. The word “greenwashing”   49   what companies do to appear   50  friendly. And “chiconomics” means a difficult time in fashion. Of course, there is a   51   that the one millionth word will be a sixth choice. The Global Language Monitor once   52  that the millionth English word would be “imminent” in 2006, but the organization has   53  that expected date  54 once. Other experts have   55   doubts about its methods because they don’t think that there is an agreement about how to classify a word.

36．A．However  B．Besides     C．Moreover  D．Therefore

37．A．ever  B．never C．even  D．sometimes

38．A．commented      B．created     C．memorized       D．motivated

39．A．added       B．acquired   C．adopted    D．devoted

40．A．years B．days  C．months     D．hours

41．A．appropriate      B．widespread       C．fundamental     D．awful

42．A．taken B．led    C．found       D．brought

43．A．physical    B．social       C．primary    D．typical

44．A．lay    B．located     C．built  D．found

45．A．conclude   B．include     C．have  D．set

46．A．saying      B．writing     C．describing D．accounting

47．A．lose   B．pay   C．have  D．stay

48．A．with  B．of     C．to      D．at

49．A．refers to   B．prefers to  C．comes to   D．sticks to

50．A．constantly B．eventually C．environmentally      D．finally

51．A．fact   B．possibility C．result D．bond

52．A．published  B．declared    C．expected   D．claimed

53．A．put up      B．put off      C．put down  D．put out

54．A．more than B．other than C．rather than       D．less than

55．A．expressed  B．instructed  C．associated D．consulted

下面关于操作脱开电门使IDG脱开的条件正确的是（）。

A.发动机停止转动

B.发动机起动手柄需在关断位

C.发动机起动手柄需在慢车位

D.发动机需工作在高慢车状态

简述生产水平和采区实行分区通风。