Which of the following is true about an aldopentose?I. It is a monosaccharide.II. It contains a CHO groupIII. It is a disaccharide.IV. It is an oligosaccharide.单项选择题

A

A) I, II, and III

B

B) II and III

C

C) I and III

D

D) I and II

E

E) I and IV

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