单项选择题
A.RNA B.cRNA C.DNA D.mRNA E.sRNA
A.无机盐 B.脂质 C.蛋白质 D.水 E.多糖
A.28~35℃,7.2~7.6 B.35~37℃,7.2~8.6 C.35~37℃,7.2~7.6 D.35~37℃,6.0~8.6 E.25~35℃,7.2~8.0