大庆原油的特点是（）。
A.含蜡低、含硫低
B.含硫高、含氮低
C.含硫低、含氮高
D.含硫低、含氧高
参考答案：C
胞间联丝
Men and women should be treated equally according to the law, but__________there is great room for improvement.
A．in reality
B．above all
C．after all
D．in return
