【判断题】启动子是 一段位于结构基因 5’ 端上游区的 DNA 序列。( )
【单选题】下列关于子对象的描述中,错误的是( )。
【判断题】启动子是一段位于结构基因5'端上游区的DNA序列,能识别和结合RNA聚合酶。
【简答题】What did Wilbur eat when he went to Fern’s home for the first time?
【单选题】The reason ____he had to look after his mother at hospital was not the one ____he gave to us.
【简答题】Why did people fatten Wilbur up?
【判断题】启动子是位于结构基因5端上游的DNA序列能被RNA聚合酶识别并结合具有转录起始的特异性。
【单选题】He ______ us ______ a cheaper hotel at last.
【单选题】When he just got off the plane, he gave us a good description of ______ in Africa.
【单选题】下列关于子对象的描述中,( )是错误的。
A.
子对象是类的一种数据成员,它是另一个类的对象