D 14.A 15.C 16.B 17.D 18.A 19.B 20.A 21.会 不会 开关一端接火线.另一端接零线 22.(1)H2CO3(2)CH4(3)CaCO3(4)CO2 23.5 240 24.略 25.真菌 细菌 二氧化碳 水 尿素尿酸 26.(1)二氧化碳可用来灭火(2)指南针指示南北方向碘遇到米饭会变蓝27.(1)电饭煲中的温控开关2:4:1 6:1:4 (2)CH4+2O2CO2+2H2O (3)天然气的燃气灶进风管较大 燃烧同体积的CO和CH4.CH4需要更多的氧气 29.(1)澄清石灰水变浑浊 澄清石灰水变浑浊.但浑浊度更大 (2)呼出的气体中含有更多的二氧化碳 30.相同横截面积.不同材料的金属拉断时所用的力不同 FGH 31.1.96 32.(1)加快化学反应的速度(2)2H2O22H2O+O2↑0.125 查看更多

 

题目列表(包括答案和解析)

A little boy almost thought of himself as the most unfortunate child in the world because a disease made his leg lame.He 36 played with his classmates.When the teacher asked him to answer questions,he always 37  his head without a word.

One 38 the boy’father asked for some saplings(树苗)from the neighbor.He wanted the 39 t0.plant a sapling each person in front of the house。The father said,“Wh6se sapling grows  best,  1  will  buy him  or her  a  favorite 40."    Seeing his  brothers  and  sisters  watering the trees,however,the boy had an idea.tie,hoped that the tree he planted would 41  soon.S0. after watering it once or twice,he never 42 it.

A few days later,when the little boy went、to see his tree again,he was 43 to find that it didn’t fade but grew some fresh leaves. 44 the trees of his brothers and sisters,his tree was even greener.His father kept his 45, bought the little boy his favorite gift and said that from the tree he planted,he would become an outstanding 46  when he grew up.

Since then,the little boy slowly became 47 .One night,he lay on the bed but eouldn’t sleep Then he got up and came to the 48.T0 his surprise,his 49 was splashing something onto his tree. 50,he understood——his father had been  51  fertilizing his small tree!

He returned to his room,52 running down  53 passed.The little boy didn’t become a botanist,but he was elected President of the United States.His name was Franklin Rooseveh.

Love is the 54 nourishment(营养)of life.55 it is just a drop of clear water,it can still help the tree of life thrive(茁壮成长).

1.                A.bravely         B.seldom         C.freely    D.always

 

2.                A.raised          B.nodded         C.lowered  D.knocked

 

3.                A.spring          B.moment        C.winter    D.week

 

4.                A.neighbors       B.friends         C.children  D.boys

 

5.                A.sapling         B.tree           C.gift  D.toy

 

6.                A.die            B.grow           C.break    D.survive

 

7.                A.1ed to         B.attended to      C.belonged to   D.objected to

 

8.                A.pleased        B.upset          C.worried  D.surprised

 

9.                A.Compared with   B.Similar to        C.Connected to  D.Popular with

 

10.               A.request        B.schedule       C.promise   D.secret

 

11.               A.president       B.botanist        C.artist D.researcher

 

12.               A.smart          B.desperate       C.optimistic.    D.practical

 

13.               A.field           B.courtyard       C.park  D.farm

 

14.               A.brother        B.sister          C.father D.neighbor

 

15.               A.All of a sudden   B.For a moment    C.In time    D.From then on

 

16.               A.busily          B.quietly         C.cautiously  D.secretly

 

17.               A.water          B.tears           C.sweat D.rain

 

18.               A.Hours          B.Months         C.Decades   D.Centuries

 

19.               A.1ast           B.only           C.1east D.best

 

20.               A.Even if         B.Now that        C.If only D.What if

 

 

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