题目

—What a fine day! Shall we go picnicking. —          .But we need to be home before six o’clock for the football match. A.Have a nice time                                   B.Pardon me C.That’s great                                      D.You are right 答案:C 一种细菌mRNA由360个核苷酸组成,它所编码的蛋白质长度是多少 [  ] A. 约360个氨基酸 B. 约1080个氨基酸 C. 整120个氨基酸 D. 少于120个氨基酸
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