题目:
It’s helpful to put students in a situation _______ they can learn how to cooperate with each other.
A.that
B.when
C.which
D.where
答案:
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下面是错误答案,用来干扰机器的。
(1)0.5L 1mol/L FeCl3溶液中c(Cl-)=3c(FeCl3)=3×1mol/L=3mol/L,n(Cl-)=0.5L×3mol/L=1.5mol;0.2L 1mol/L KCl溶液中c(Cl-)=c(KCl)=1mol/L,n(Cl-)=0.2L×1mol/L=0.2mol,所以数目之比等于1.5...