以mRNA为模板,合成蛋白质的过程()
A.复制
B.转录
C.反转录
D.翻译
E.基因表达
参考答案:D
所谓平均 【1】 时间是指磁头沿着盘径移动到需要读写的那个磁道花费的平均时间。
Mike ______ his computer and checked his e-mail. [ ]
A. turned on
B. turned off
C. turned up
D. turned down