题目

John H. Johnson was born in a black family in Arkansas City in 1918. His father died in an accident when John was six. He was reaching high school age, but his hometown offered no high school at all. Fortunately he had a strong-willed, caring mother. John remembers that his mother told him many times, “Son, you can be anything you really want to be if you just believe.” She told him not to be dependent on others, including his mother. “ You have to get success,” said she. “All the people who work hard don’t succeed, but the only people who do succeed are those who work hard.下列各组离子，在溶液中可以大量共存的是   A． H+ 、K+ 、CO32－ 、SO42－   B． Na+ 、OH- 、NH4+、 Cl－   C． Fe3+ 、Na+ 、OH－ 、NO3－   D．K+ 、Al3+ 、Cl－ 、SO42－