减粘裂化的原料一般情况下是（）
A、煤油
B、渣油
C、汽油
D、柴油
参考答案：B
As we all know, the problems of environmental pollution facing us today are far from ____.
A．solving
B．being solved
C．having solved
D．solved
MTBE产品中的杂质有哪些？哪些是有害杂质，哪些是无害杂质？
