多个氨基酸分子缩合形成具有两条肽链的蛋白质时,相对分子量减少了900,由此可推知该蛋白质分子中所含的氨基酸数和肽键数最可能分别是( ) A.52,50 B.50,48 C.50,50 D.51,49 答案:A
The Summer Palace is really beautiful.In fact, I doubt whether China has ________ park.
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A.a more beautiful
B.a most beautiful.
C.the most beautiful
D.a beautiful