哺乳动物某一类型细胞中，只有大约10%的mRNA种类是该类型细胞所特有的，这类基因称为管家基因。 ( )
参考答案：错
Film has a much shorter history, especially when_ such art forms as music and painting. [ ]
A. having compared to
B. comparing to
C. compare to
D. compared to
局部通风机风筒末端距工作面的距离，岩巷不大于5m，煤巷不大于10m。
