Hi, I’m Xin Yue. I am 15 years old. I st

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问题:

Hi, I’m Xin Yue. I am 15 years old. I study at Monte Vista Christian School in California, US. The school ife in America is 小题1:  from that in China. I’d like to   小题2:  you something about my school life in America.

I took many textbooks to school in China. But in America, I usually take one thing    小题3:  me--- an iPad.

Every student at my school uses an iPad for study. We rent them from the school,  小题4:   costs about $ 100. We can use them for three years.

 小题5:  we have classes, we download textbooks and other teaching materials online with our iPads. We can not only read the electronic books,    小题6:  also listen to music or watch videos in class. It makes our study full of fun.

But they also bring us some    小题7: . Some of my classmates play games or do other things in class.

I think if we have good self-control, iPads can be very helpful. Do you   小题8:    with me?

考点:主谓一致连词成句
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(11分)(2011·滨州模拟)Ⅰ.回答下列有关常数的问题:

(1)Kw的数学表达式是________,温度升高Kw________(选填“变大”“变小”或“不变”),若定义pOH=-lgc(OH),则pH+pOH=________(用含Kw的代数式表示)。

(2)Ka通常表示弱酸的电离平衡常数,Ka值越大表示该弱酸的酸性________。α通常称为电离度,顾名思义是表示弱电解质的电离程度大小的一个指标,对于某一元弱酸,当用蒸馏水稀释该酸时,Ka________(选填“变大”“变小”或“不变”)。α________(选填“变大”“变小”或“不变”)。

(3)Ksp表示难溶物的溶度积常数,该常数越大表示________。

Ⅱ.已知常温下,AgBr的Ksp=4.9×10-13mol2·L-2、AgI的Ksp=8.3×10-17mol2·L-2

(1)现向含有AgI的饱和溶液中:

①加入固体AgNO3,则c(I)________(填“变大”“变小”或“不变”,下同);

②若改加更多的AgI,则c(Ag)________;

③若改加AgBr固体,则c(I)______;而c(Ag)______。

(2)有关难溶盐的溶度积及溶解度(与AgBr、AgI无关),有以下叙述,其中正确的是________。

A.两种难溶盐电解质,其中Ksp小的溶解度一定小

B.向含有AgCl固体的溶液中加入适量的水使AgCl溶解又达到平衡时,AgCl的溶度积不变,其溶解度也不变

C.将难溶电解质放入纯水中,溶解达到平衡时,电解质离子的浓度的乘积就是该物质的溶度积

D.溶液中存在两种可以与同一沉淀剂生成沉淀的离子,则Ksp小的一定先生成沉淀E.难溶盐电解质的Ksp与温度有关

F.同离子效应(加入与原电解质具有相同离子的物质),使难溶盐电解质的溶解度变小,也使Ksp变小

(3)现向含有NaBr、KI均为0.002 mol·L1的溶液中加入等体积的浓度为4×103 mol/L AgNO3溶液,则产生的沉淀是________(填化学式);若向其中再加入适量的NaI固体,则最终可发生沉淀转化的总反应方程式表示为:______________________________。

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智能网呼叫的逻辑控制是由()完成的。

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She was    ___  buy the new book in that book store.[ ]

A. eager for    

B. eager to

C. eagerly for   

D. eagerly to

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主法律行为履行完毕,则从法律行为的效力丧失。()

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急性肾衰竭少尿期一般为().

A.6天

B.7~14天

C.4周

D.4~6周

E.3天

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