难溶电解质AgCl在浓度为0.01mol/dm的下列溶液中，溶解度最小的是：（）
A.NH3
B.NaCl
C.H2O
D.Na2S2O2
参考答案：B
These books are ___ children. There are many interesting stories with pictures in them.
A．devoted to
B．intended for
C．connected with
D．introduced for
降价虽然能吸引消费者促进销售，但有时也会带来负面效果。是否正确？为什么？
