把外源质粒导入细菌中的方法称为（）
A、转导
B、转化
C、转染
D、转入
E、克隆
参考答案：B
Our shoes are of great variety and quality.________. Quickly buy it!
A．Opportunity seldom knocks twice
B．Lies have short legs
C．One false move may lose the game
D．Kings go mad, and the people suffer for it
室间隔缺损
A．右房右室大，肺动脉段突出，肺野充血B．左房左室大，肺动脉段突出，肺野充血C．右房右室大，肺动脉段突出，肺野充血D．右室大，肺动脉段凹陷，肺野清晰E．左，右室大，肺动脉段突出，肺野充血
