问题 选择题

下列实验现象的描述正确的是

A.氢气在氯气中燃烧,发出苍白色火焰,瓶口上方有白色烟雾

B.铁丝在氯气中燃烧,产生棕褐色的浓烟,产物溶于水,溶液呈浅绿色

C.铜在氯气中燃烧,产生棕黄色烟,产物溶于水,溶液呈蓝绿色

D.钠在空气中燃烧,发出黄色的火焰,生成白色固体

答案

答案:C

题目分析:A项瓶口上方有白色烟雾错误,只有氯化氢溶于水蒸汽中,是白雾,没有烟;B项溶液呈浅绿色错误,应该是棕黄色溶液;C项正确;D项生成白色固体错误,是淡黄色的过氧化钠。

点评:对于反应中出现的现象,在平时学习中要总结,属于简单题。

完形填空

Many of us spend a great deal of time and energy trying to prove that we are right-and others are wrong. Many people believe that it’s their job to  36  others how their positions, statements, and points of view are   37 , and that in doing so, the person they are correcting is going to somehow   38   it, or at least learn something. Wrong!

Think about it. Have you ever been   39   by someone and said to him, “Thank you so much for showing me that I’m wrong and you’re right.”? Or, has anyone you know ever   40  you when you corrected them, or made yourself “right” at their   41  ? Of course not. The truth is, all of us   42  to be corrected. We all want our positions to be   43   and understood by others. Being listened to and heard is one of the greatest   44  of the human heart. And those who learn to   45   are the most loved and respected. Those who are in the   46  of correcting others are often resented and   47  .

A wonderful way for becoming more peaceful and loving is to practise   48   others the joy of being right-      give them the glory.   49  correcting. When someone says, “I really feel it’s important to\:”, rather than jumping   50   and saying, “No, it’s more important to…:”, simply let it go and allow their statement to   51 . The people in your life will become less defensive and more   52  . They will appreciate you more than you could ever have 53. You’ll discover the joy of joining in and witnessing other people’s   54 , which is far more rewarding than a battle of egos (自我). Starting today, let others be “  55  ”, most of the time?

36.A.show      B.ask      C.prove   D.teach

37.A.unimportant   B.unbelievable       C.incorrect     D.imperfect

38.A.consider B.appreciate    C.understand   D.refuse

39.A.fooled    B.helped  C.taught  D.corrected

40.A.thanked  B.rewarded     C.cared   D.accepted

41.A.side B.price    C.expense       D.cost

42.A.like B.hate     C.prefer  D.afford

43.A.admired  B.received      C.realized       D.respected

44.A.shortcomings B.advantages   C.desires D.wishes

45.A.talk B.praise   C.help     D.listen

46.A.habit      B.form    C.position       D.purpose

47.A.punished B.avoided       C.left      D.scolded

48.A.letting    B.lending       C.allowing      D.owing

49.A.Stop       B.Continue     C.Practise       D.Try

50.A.out  B.up       C.in D.off

51.A.last B.go       C.work    D.stand

52.A.helpful   B.loving  C.careful D.popular

53.A.dreamed B.wanted C.asked   D.demanded

54.A.sufferings      B.worries       C.successs       D.happiness

55.A.happy     B.right    C.sorry    D.proud

多项选择题