问题 问答题

做完实验后,必须认真填写实验报告.下表是某同学的实验报告,请你帮助填写完整.

被检验物质实验步骤实验现象结  论
溶液A①向少量A中加NaOH溶液

②过滤,将所得固体加入稀盐酸中

③向滤液中加入BaCl2溶液和稀硝酸

①______

②______

③______

A是Fe2(SO43
溶液B④向少量B中加入紫色石蕊试液

⑤向少量B中加入AgNO3溶液和稀硝酸

④石蕊试液变红

⑤生成白色沉淀

B______

答案

溶液A:NaOH溶液可与Fe2(SO43反应生成红褐色氢氧化铁沉淀,氢氧化铁和盐酸可发生中和反应生成氯化铁和水,氯化铁溶液显黄色,Fe2(SO43可与BaCl2溶液反应生成不溶于稀硝酸的白色沉淀硫酸钡;

溶液B:向少量B中加入紫色石蕊试液变红,说明该溶液中含有氢离子,向少量B中加入AgNO3溶液和稀硝酸,生成白色沉淀,说明该溶液中含有氯离子,与AgNO3溶液反应生成不溶于稀硝酸的白色沉淀氯化银,由此推测溶液B是HCl;

故答案为:

被检验物质实验步骤实验现象结  论
溶液A①向少量A中加NaOH溶液

②过滤,将所得固体加入稀盐酸中

③向滤液中加入BaCl2溶液和稀硝酸

①有红褐色沉淀生成

②固体逐渐溶解,溶液由无色变为黄色

③有白色沉淀生成,加入稀硝酸不溶解

A是Fe2(SO43
溶液B④向少量B中加入紫色石蕊试液

⑤向少量B中加入AgNO3溶液和稀硝酸

④石蕊试液变红

⑤生成白色沉淀

B 是HCl

填空题
完形填空

第二节 完型填空(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。

In the dining room of my grandfather’s house stood a massive grandfather clock. Meals in that dining room were a   36  for four generations to become one. The table was always   37  with food from wonderful family recipes(食谱)all containing   38  as the main ingredient(成分). And always that grandfather clock stood like a trusted old family   39  , sharing our happiness.

As I was a child, the old clock  40  me. I watched and listened to it during meals. I   41  how at different times of the day, that clock would strike with a wonderful   42  . Year after year, the clock struck a part of my   43  , a part of my heart.

Even more wonderful to me was what my grandfather did each day. He  44  wound that clock with a special and magic key, which   45  the clock ticking and striking. He never let that clock wind down and   46  . When we grandkids got a little older, he showed us how to   47  the clock.

Several days after my grandfather died, I entered the dining room, with tears flowing   48  . The clock stood desertedly   49  , seeming smaller and not as magnificent as before. I couldn’t   50  to look at it.

Years later, my grandmother gave me the clock and the key. The old house was quiet. I opened the clock door with my shaking hand. Then   51  , reverently(虔诚地), I entered the key and wound the clock. It sprang to  52  . Tick – tock , tick – tock, life and chimes were   53  into the dining room, into house and into my  54  . In the movement of the hands of the clock, my grandfather   55  again.

36.A.party B.time  C.place D.situation

37.A.filled B.cleared     C.spread      D.left

38.A.wine B.surprise    C.fish   D.love

39.A.friend       B.guard       C.doctor      D.lawyer

40.A.disappointed    B.encouraged      C.interested  D.comforted

41.A.questioned       B.remembered     C.doubted    D.wondered

42.A.sound       B.hammer    C.voice D.beat

43.A.studies      B.opinions   C.memories  D.brains

44.A.strangely  B.carefully   C.eagerly     D.usually

45.A.got    B.kept  C.prevented  D.found

46.A. break      B.fall    C.stop   D.move

47.A.wind B.repair       C.read  D.clean

48.A.unexpectedlyB.gently   C.difficultly D.freely

49.A.ticking     B.moving     C.noisy D.quiet

50.A.help  B.bear  C.hope  D.insist

51.A.slowly      B.quickly     C.unwillingly      D.naturally

52.A.feet   B.hands       C.sense D.life

53.A.breathed   B.blown       C.taken D.sent

54.A.study B.bedroom   C.heart D.mind

55.A.died  B.lived C.smiled      D.sang