问题
选择题
The _____________ (明信片) is beautiful.[ ]
A. card
B. post card
C. post office
答案
答案:B
The _____________ (明信片) is beautiful.[ ]
A. card
B. post card
C. post office
答案:B
红色链孢霉m+与+t杂交,得到如下结果:
基因型 | mt | m+ | m+ | m+ | m+ | mt | m+ |
++ | +t | +t | mt | m+ | mt | ++ | |
mt | m+ | mt | ++ | +t | ++ | mt | |
++ | +t | ++ | +t | +t | ++ | +t | |
子囊数 | 2 | 4 | 6 | 8 | 32 | 36 | 112 |
子囊型类别 | |||||||
分裂的时期 |