We tried to _______ his doubts and let him tell the truth.
A:replace
B:review
C:remove
D:rebuild
下列关于细菌的菌落特点的叙述错误的是( )
如图中甲、乙分别表示两种电压的波形,其中甲电压按正弦规律变化.下列说法正确的是( )