几个单项式的( )叫做多项式,每个单项式叫做多项式的( ),不含字母的项叫( )。
和;项;常数项
以下哪种材料为肠溶型薄膜衣的材料
A.丙烯酸树脂Ⅳ号
B.MC
C.醋酸纤维素
D.丙烯酸树脂Ⅱ号
E.HPMC
— You don't come from America, do you?
— ______. I come from England. [ ]
A. No, I do
B. Yes, I do
C. Yes, I don't
D. No, I don't