蟾酥的内服用量按照2010年版《中华人民共和国药典》是()
A.0.09g
B.0.015~0.03g
C.0.05g
D.0.1g
E.0.6g
参考答案:B
I______this first edition of Paradise Lost in a secondhand bookstore in London.
A.came to
B.came in
C.came across
D.came down
肽酰转移酶(peptidyl transferase)