问题 填空题

(3分)金属在日常生活中应用广泛。

⑴最初输水管材用铸铁,目前多用塑料管和塑料金属复合管,输送热水一般用铜管。下列管材中,属于金属材料的是____     __(填字母序号,下同)。

A.铸铁管               B.铜管            C.塑料管

(2分)铁虽然常温下与水不反应,但铁制品在潮湿的环境中容易生锈。某同学进行了如右图所示实验。一周以后发现铁钉表面锈蚀。图中a、b、c三处锈蚀情况最严重的是           (填字母),产生该现象的原因是                                     

答案

(3分)(1)AB (2)b   b处铁钉与水、空气同时充分接触

(1)铁、铜属于金属材料、塑料不是金属材料

(2)铁生锈的原因有两点:1、水。2、空气。题中a处缺少水,c处缺少空气,而b处既有水又有空气,故b处生锈最严重

选择题
完形填空

My grandfather took me to the fish pond on the farm when I was seven. He told me to throw a__21____into the water. And he told me to watch the____22___created by the stone. Then he asked me to__ 23__ of myself as that stone.

“You may24 lots of splashes (飞溅 ) in your life,___ 25___the waves that come from those splashes will ___26____the peace of all your fellow___27_____,”he said.

“Remember that you are ___28____for what you put in your circle and that the circle will also___29____many other circles. You will need to live in the ___30____that allows the good that comes from your circle to ___31____the peace of that goodness to___32____. The splash that comes from anger or jealousy will send those___33_____to other circles. You are responsible for____34_____.”

That was the first time I ___35_____each person creates the inner peace or discord (冲突) that ____36_____out into the world. We cannot create world peace if we are ___37____with inner conflicts, hatred, ____38______, or anger. We radiate (流露) the feelings and thoughts that we hold ____39_____,whether we speak them out or not. Whatever is splashing around inside of us is spilling out into the world, creating beauty or discord with all other circles of life.

We are ____40_____to everything and everyone else around in the universe.

21. A. stick    B. brick     C. stone      D. ball

22. A. holes    B. circles    C. drops      D. waters

23. A. think    B. accuse    C. regard     D. warn

24. A. produce  B. damage   C. prevent    D. create

25. A. but      B. because   C. while      D. for

26. A. cut      B. disturb    C. bring      D. block

27. A. students  B. friends    C. creatures   D. workers

28. A. proud    B. helpful    C. respectful   D. responsible

29. A. hear     B. leave      C. strike      D. touch

30. A. family   B. situation    C. way       D. hurry

31. A. send     B. provide    C. destroy     D. keep

32. A. them     B. nobody    C. someone    D. others

33. A. tastes     B. smells     C. feelings    D. views

34. A. all       B. both       C. neither     D. any

35. A. realized   B. recognized   C. admitted   D. promised

36. A. flows     B. takes       C. picks       D. brings

37. A. prepared   B. filled      C. presented    D. supplied

38. A. honesty    B. truth       C. doubt      D. modesty

39. A. forward    B. outside     C. inside      D. upward  

40. A. referred    B. intended    C. devoted    D. connected