【单选题】雄黄的主要成分是
C.
含水硫酸钠(Na 2 SO 4 ·10H 2
D.
含水硅酸镁[Mg(Si 4 O 10 )(O 2 ]
【单选题】______by the news of his father's death, he could hardly utter a word.
【单选题】---My son hardly ever eat vegetables ____ it’s good for his health. ---That is not a good habit.
【单选题】The workers could hardly the boss’s bad temper but under his supervision they had to themselves to working harder.
【单选题】It’s clear that ________ little money he earns can hardly support his family.