与粉体的流动性有关的参数有A．休止角 B．比表面积 C．内摩擦系数 D．孔隙率 E．
题型：多项选择题
问题：
与粉体的流动性有关的参数有
A．休止角
B．比表面积
C．内摩擦系数
D．孔隙率
E．流出速度
题型：多项选择题
看图，完成对话。
Betty: Hi. Jim ! 1 that?
Jim: It's a 2 3 my family.
Betty:Oh, can I see it?
Jim: OK!
Betty: Is this your father, Jim?
Jim: Yes, 4 5 .
Betty: And is this your 6 ?
Jim: Yes, it 7 17 . She is my mother.
Betty: And is this your 8 ?
Jim: No, 9 10 . She is my cousin.
Betty: 11 her name?
Jim: Cissy.
Betty: 12 do you 13 it?
Jim: C-I-S-S-Y.
Betty: What's 14 15 name?
Jim: White.
Betty: 16 you. Jim.
Jim:That's OK.
