段殖体
参考答案:
是由两个营养细胞间生出胶质隔片或由间生异形胞断开后形成的若干藻丝分段。
A.200V,0.08s
B.25V,0.04s
C.50V,0.08s
D.50V,0.04s
PP的加工温度应略低于PE的加工温度。