肺炎链球菌摄取编码荚膜的基因片段,可通过的方式为
A.转化 B.接合 C.转导 D.溶原性转换 E.原生质体融合
参考答案:A
She _______ her tears and continued to fight against the cruel customs that killed her daughter. [ ]
A. wiped out
B. wiped away
C. wiped up
D. wiped down
红外车辆分离器由()组成。
A、红外线发射器
B、轮胎识别器
C、红外线接收器
D、光幕控制器