siRNA小干扰RNA
参考答案：
一种可由RNA依赖性RNA聚合酶扩增并经过Dicer切割形成的可介导同源mRNA降解或翻译抑制的小双链RNA。
_____, Mother will wait for him to have dinner together.
A．However late is he
B．However he is late
C．However is he late
D．However late he is
类固醇硫酸酯酶缺乏见于（）
A.常染色体显性遗传性寻常鱼鳞病
B.性联遗传性寻常鱼鳞病
C.弥漫性掌跖角化病
D.点状掌跖角化病
E.进行性对称性红斑角化病
