合成后无需进行转录后加工修饰就具有生物活性的RNA是（）
A、tRNA
B、rRNA
C、原核细胞mRNA
D、真核细胞mRNA
参考答案：C
He went _____ his way _____ some flowers for his mother.[ ]
A. out of; to buy
B. out; to buy
C. out of; buying
D. out; buying
人类真正幸福的东西是（）？
A、德性加上才华
B、金钱加上才华
C、名望加上才华
D、权利加上才华
