重组子筛选所用的核酸分析法的内容是什么?
参考答案:
1)核酸杂交法
①菌落印迹原位杂交;
②斑点印迹杂交;
③Southern印迹杂交
2)聚合酶链式反应法
3)DNA测序法
He ________ the club and ______ a lot of its activities in his spare time.[ ]
A. took part in; joined
B. joined; took part in
C. joined; took a part in
D. took part in; took part in
在幻灯片上将矩形线条设置为红色三磅的短划线,并将幻灯片上的矩形和椭圆这两个图形组合进行复制。