【单选题】电梯门机构轿门带动层门动作的装置是( )
【简答题】It’s good to talk’, so some people say. When I commute into London, there are certainly plenty of people conversing on their mobile phones – sometimes too loudly – discussing and sharing personal deta...
【判断题】平推流反应器的返混为∞;全混流反应器的返混为0。
【简答题】平推流反应器的返混为_______,全混流反应器的返混为_______。
【判断题】People conversing in the hall or a room that is stifling hot or freezing cold are all internal interference to the audience.
【单选题】The idea that people cooperate with each other in conversing is generalized by Grice (1975) as __________.
A.
the principle of relevance
C.
the politeness principle
D.
the theory of prototypes
【单选题】有三个关系R、S和T如下: 则由关系R和关系S得到关系T的操作是