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【单选题】
设R1和R2是集合上的相容关系，则R1⊕R2A.
一定是相容关系
B.
一定不是相容关系
C.
可能是也可能不是相容关系
D.
一定是等价关系
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【简答题】Serious-looking men spoke to one another as if they were oblivious of the crowds about them.(Para. 2) 2. At last this intermezzo came to an end, and I found myself in front of the gigantic City Hall. ...
【简答题】Translate the sentence into Chinese: I didn't realise that my Chinese guest wanted to get know me first. I became worried when my guest didn't want to start talking business.
【判断题】The guest wanted to have the bathroom cleaned because he just had a shower and the bathroom was in a mess.
A.
正确
B.
错误
【简答题】The guest made a (1)__________ on the (2)_______ hole. The bag dropper said (3)_________ to the guest. So the guest gave a (4)_______ to the dropper. The bag dropper (5)_______ checked the guest's cl...
【简答题】II. Look up the words inquotation marks in the dictionary and explaqin: 1. because I had “a lump in my throat” 2. to have the same "preoccupations" 3. to "rub shoulders with" 4. "bobbed up and down" r...
【简答题】Serious-looking men spoke to one another as if they were oblivious of the crowds about them...(Para.2)
【单选题】The guest wanted to check out __________.
A.
.for a while
B.
just a moment
C.
within easy reach
D.
right away
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