we must ask people not to cyt down trees now.保持句意不变 we must
三个字的拼音首字母分别为cmt和cyt能代表哪三个字?
we must ask people not to cyt down trees now.保持句意不变
13. 一给定的mRNA顺序,如果阅读框已被确定,它将只编码一种多肽的AA顺序.如果给一个蛋白质,如cyt C的已知AA
B
b.
(b,
计算a+b/b-a-b/b
A=B+B+B+B+B+B+B+B+B+B+B+B+B+B+B A-B×3=C C+2×7+2=1
a+b>a-b,
如果a>b,b
证明(b-a)/b