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[填空题]
- () -Oh, no,Frankly speaking, I seldom do online shopping.
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Frankly speaking, I' d rather you ______anything about it for the time being.
A.didn't do
B.haven't done
C.don't do
D.have done
A.Sn(OH)2、Sn(OH)4酸性依次增强
B.Sn(OH)2、Pb(OH)2碱性依次增强
C.Sn(OH)2、Pb(OH)2均显两性
D.Pb(OH)2只显碱性,Sn(OH)4只显酸性
Fe(OH)3,Co(OH)3,Ni(OH)3的氧化性依次_________,Fe(OH)2,Co(OH)2,Ni(OH)2中_________不与空气中的氧作用。
下列物质中,酸性最强的是 ()
A.B(OH)3
B.Al(OH)3
C.Si(OH)4
D.Sn(OH)4