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【单选题】
()提出“我们在事物上先天认识的东西知识我们自己放进事物的东西。”A.
叔本华
B.
胡塞尔
C.
康德
D.
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【单选题】下列浓度为 0.1 mol·L -1 的溶液,可用 0.1 mol·L -1 HCl 标准溶液准确滴定的是
A.
NaAc ｛已知 pK a (HAc)=4.75 ｝
B.
羟胺 (pK b = 8.04 )
C.
苯甲胺 (pK b =4.67)
D.
苯甲酸钠｛已知 pK a ( 苯甲酸 ) = 4.21 ｝
【简答题】5) There’s no doubt about that, and in this culture where anything and everything goes, the guywith the biggest toys wins, and all, that, I think some self-imposed rules to bring about andmaintain som...
【多选题】常温下，用 0.1 mol·L —1 HCl溶液滴定10.0 mL浓度为0.1 mol·L —1 Na 2 CO 3 溶液，所得滴定曲线如图所示。下列说法正确的是
A.
当V＝0时：c(H ＋ )＋c(HCO 3 － )＋c(H 2 CO 3 )＝c(OH － )
B.
当V＝5时：c(CO 3 2— )＋c(HCO 3 － )＋c(H 2 CO 3 )＝2c(Cl － )
C.
当V＝10时：c(Na ＋ )＞c(HCO 3 － )＞c(CO 3 2— )＞c(H 2 CO 3 )
D.
当V＝a时：c(Na ＋ )＞c(Cl － )＞c(H ＋ )＝c(OH － )
【简答题】What do you think of stress? Is it a good thing or a bad thing? Most of the students think stress can do harm (伤害) 46 them in some ways. There’s a story about a ager in a middle school. He even 47...
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