亚硫酸钠（）. A．W/O型乳化剂  B．O/W型乳化剂  C．助悬剂  D．絮凝剂

根据上面的对话内容，完成Tom的家谱图。

Peter: Look, it's Tom's family photo.

Jim: Is this his sister?

Peter: I don't know. Tom, is this your sister?

Tom: Yes, it's my elder sister. Her name is Linda.

Jim: How about this woman? Is she your mother?

Tom: No. She is my aunt. Her name is Carol. Those are my parents. My father Frank is a doctor

        and my mother Sarah is a professor (教授).

Peter: Who's this baby then?

Tom: It's my cousin. She is Allen and Carol's daughter. Her name is Sally. She is only 3 years old.

Jim: She is so cute. These two people are your grandparents, aren't they?

Tom: Yes, they are. They are both teachers. Their students call them Mr and Mrs Green.

在考察对象整个期间各个时点上实际发生的资金流出与流入称为( )。

A．现金流出

B．现金流量

C．现金流入

D．净现金流量

土壤侵入体包括哪些？

试使用循环结构编程计算y=2¹+2²+.....+2¹⁰并求出结果。

《安全生产法》规定，生产经营单位主要负责人对本单位安全生产工作负哪六个方面的职责？