利用氯仿沥青“A”的分析结果判断生油母质的类型时通常用()2个参数。
A.H/C、N/C
B.H/C、S/C
C.H/C、O/C
D.O/C、Cl/C2
参考答案:C
- You look worried. What's the matter?
- I have some problems with my parents. I really don't know_______.
A.who to speak
B.who speaks to
C.who to speak to
D.who speaking to