下列哪一条不属于真核基因组结构特点()
A.大量的重复序列
B.mRNA为单顺反子
C.mRNA为多顺反子
D.基因是不连续存在的
E.人的基因组大小为3×109碱基对
参考答案:C
构成换流站直流侧的直流谐波滤波回路的有()。
A.直流滤波器
B.平抗
C.换流器
D.接地极
After he retired from office, Rogers_________ painting for a while , but soon lost
interest. [ ]
A. took up
B. saved up
C. kept up
D. drew up