I called you, but nobody answered. Where ________ you? [ ]
A. is
B. are
C. was
D. were
答案:D
关于炎症时脓细胞的概念,错误的是
A.形态多不规则B.细胞已变性坏死C.结构模糊D.常成团分布,细胞界线清晰E.胞质充满粗大颗粒,核不清楚
生产上常用的种子催芽的方法有()和新技术应用。
A、层积催芽
B、水浸催芽
C、化学药剂催芽
D、机械催芽