A:Cu2+、Mg2+、SO42﹣、NO3﹣
B:H+、Mg2+、SO42﹣、HCO3﹣
C:Ag+、Na+、NO3﹣、Cl﹣
D:NH4+、Ba2+、NO3﹣、OH﹣
在△ABC中,∠A=13∠B=15∠C,则△ABC是( )
—I've got a headache.
—No wonder.You in front of the computer too long.
看拼音写词语
mā ma
nǎi nai
zhōnɡ wǔ
fànɡ huí
shōu qǐ
____