【简答题】设全集U={1,2,3,4,5,6,7,8),集合M={3,4,5),集.合N={1,3,6),则集合P={2,7,8)可表示成 ( ) A.M∪N D.M∩N
【单选题】设集合U={1,2,3,4,5},集合M={3,5},N={1,4,5},则M∩ =' ' ( )
【单选题】When was the hammock invented and by whom?
A.
The Indians had invented the hammock long before they came to South America.
B.
The Indians had invented the hammock long before the Europeans came to South America.
C.
The Europeans invented the hammock after they made acquaintance with the Indians.
D.
The Europeans had invented the hammock before they went to South America.
【单选题】设全集U={1,2,3,4,5},集合M={1,3,5},集合N={3,4,5},则集合(C U M)∩N等于( )
【简答题】Once, long ago, there was a man who traveled from Persia to India on foot. He had been to India before. When he arrived at a village, he happened upon a fruit stand. In that village, fruit was quite b...
【单选题】—How long do you think it will be _______ we get the loan?—Perhaps two or three months.
【单选题】It’s not the whole nation rose up and drove the enemy out of their homeland.
【单选题】Not ____ he died, he received an award for his selfless service to the old. [ ]
【单选题】He said he had been to Hong Kong ____ and he would go there _____ once again. [ ]
A.
long before, before long
B.
before long, long before
D.
long before, long before
【判断题】磁盘的磁道和光盘的光道都是由外向内的同心圆。