霉腐微生物中,霉菌大都属()。
A.干生型
B.湿生型
C.中性型
D.中温型
E.低温型
参考答案:C, D
We confirm()your order No.7891 dated May 10,1990.
A.to have received
B.having received
C.receiving
D.toreceive
鹅的受精卵的孵化期平均为()天。
A、15天
B、21天
C、31天
D、40天