题目:
具有还原性的糖类是()。
A.海藻糖
B.乳糖
C.麦芽糖
D.蔗糖
E.葡萄糖
答案:
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Dear Jim, How time flies! You asked me how I spent my summer vacation in your last email.As you know, I finished my college entrance exams this year and I had nea...