(1)写出一个以离子浓度表示的电荷守恒等式:。 (2)写出一个含有c(OH-)和

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问题:

(1)写出一个以离子浓度表示的电荷守恒等式:                       

(2)写出一个含有c(OH)和c(H)的等式:                           

(3)根据Na3PO4中Na、P原子个数关系,写出一个含有c(Na)和c(PO)的等式:                           

考点:弱电解质电离的影响因素弱电解质的电离度弱电解质的电离
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小题1:The film on detectives is so interesting that Tim has already seen it ___________.(two)

小题2:I am sure George is able to make a real car by ________.(he)

小题3:If you want to keep _______,you should do some exercise every day.(health)

小题4:“Take care of yourself,”my mother said __________to me.(gentle)

小题5:Shanghai is now very modern. Many foreigners will become the_____ of Shanghai in the future.(city)

小题6:The soup is good for you.It is a ________of different kinds of vegetables.(mix)

小题7:Please _________the milk in the microwave before you drink it.(heat)

小题8:They won’t publish Johnson’s report unless he _________it.(write)

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任给一些不同的实数n,得到不同的抛物线y=2x2+n,如当n=0,±2时,关于这些抛物线有以下结论:①开口方向都相同;②对称轴都相同;③形状都相同;④都有最低点,其中判断正确的个数是(  )

A.1个

B.2个

C.3个

D.4个

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TE60型二节拉梯缩合时高为6000mm。

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一个钟的时针长4厘米,这个时针的尖端转动一昼夜所走的路程是多少厘米?(注意:一昼夜,时针则走2圈)

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处理火灾,在反风前,必须将进风侧的人员撤出,并采取(),防止反风后火灾向进风侧蔓延。

A.减少进风的措施

B.阻止火灾蔓延的措施

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