A:SO42﹣、K+、Na+、OH﹣
B:K+、SO42﹣、Cu2+、NO3﹣
C:Cl﹣、K+、SO42﹣、Na+
D:Ca2+、Cl﹣、CO32﹣、Na+
——Why ________ your father like koalas?
——Because they are ________ interesting.
shān hóng
měng zhǎng
lǎn duò
sú yǔ
____