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【单选题】
已知4阶矩阵A的第三列的元素依次为1,3，-2,2，它们余子式的值分别为-3,2，-1,1，则A的行列式为A.
9
B.
-9
C.
-7
D.
7
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举一反三
【多选题】When conversing with people in English, sometimes we find ourselves in situations where we have to ask someone to repeat what they have said when:
A.
we have not heard them
B.
we have not understood them well
C.
we need to seek clarification
D.
the speed was too fast
【简答题】平推流反应器的返混为 。
【多选题】(多选)When conversing with people in English, sometimes we find ourselves in situations where we have to ask someone to repeat what they have said when:
A.
we have not heard them
B.
we have not understood them well
C.
the speed was too fast
D.
we need to seek clarification
【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】People conversing in the hall or a room that is stifling hot or freezing cold are all internal interference to the audience.
A.
正确
B.
错误
【简答题】平推流反应器的返混为（）。
【单选题】The idea that people cooperate with each other in conversing is generalized by Grice (1975) as __________.
A.
the principle of relevance
B.
cooperative principle
C.
the politeness principle
D.
the theory of prototypes
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