已知氨基酸平均分子质量为120Da。有一种多肽的分子质量是15120Da,如果此多肽完全以α螺旋形式存在,试计算此α-螺旋的长度和圈数。
查看答案
He comes from _________.
A. Swedish
B. Sweden
C. Swiss
D. Swedishland
The car bumped along the_________ road.
A. roughly
B. roughness
C. rough
D. roughy
Last year Europe suffered a really ______ winter.
A. severe
B. severely
C. serious
D. seriously
Retailersbuygoodsdirectlyfrom the____________ orfrom awholesaler.
A. manufacture
B. manufacturing
C. manufacturor
D. manufacturer