单个细菌在个体培养基上生长可形成()。
A.菌苔
B.菌丝
C.菌团
D.菌膜
E.菌落
参考答案:E
I think the_____invention is a cell phone. What about you? [ ]
A. helpful
B. more helpful
C. most helpful
操作井下电气设备应遵守哪些规定?