利用酵母菌发酵产生酒精时,投放的适宜原料和在产生酒精阶段要控制的必要条件分别是 [ ]
A.玉米粉和有氧
B.大豆粉和有氧
C.玉米粉和无氧
D.大豆粉和无氧
C
10kV电压互感器在高压侧装有熔断器,其熔断丝电流应为1.5A。
They are good friends. is no wonder that they know each other so well.
A.This
B.That
C.There
D.It