【单选题】Then professor walked onto the platform and seated himself in a chair, ______ for answering questions.
【单选题】The professor walked onto the platform and seated himself in a chair, for answering questions. [ ]
【判断题】购买行为是引起购买动机的关键因素,是购买动机的基础,是购买动机的起点,同样也是企业市场营销的出发点。 ( )
【单选题】The professor walked into the classroom and he carried a bag of books with him.
A.
The professor walked into the classroom,carrying a bag of books with him.
B.
The professor walked into the classroom ,carried a bag of books with him.
C.
The professor walked into the classroom to carry a bag of books with him.
D.
The professor walked into the classroom, carry a bag of books with him.
【判断题】用等份规来等分一段线时,如果不出现虚线,只需要单击右键即可出现虚线。
【简答题】The professor walked onto the platform and seated himself in a chair,________ for answering questions. A.had prepared B.being prepared C.preparing D.prepared
【判断题】在自动变速器的行星齿轮机构中,太阳轮、齿圈和行星齿轮 3 者的旋转轴线是重合的。
【单选题】The professor walked onto the platform and seated himself in a chair, ____ for answering questions.
【判断题】在自动变速器的行星齿轮机构中,太阳轮、齿圈、行星齿轮、行星架这4个元件都可以作为动力传递时的输入、输出部件