已知U={x|x≤10,x∈N*},A∩∁UB={2,4,6},∁UA∩B={5,7,9},∁UA∩∁UB={1,10},求A,B. 答案:解:已知U={x|x≤10,x∈N*},A∩∁UB={2,4,6}, ∴集合A中至少有:2,4,6,集合B中没有:2,4,6,∵∁UA∩B={5,7,9},∁UA∩∁UB={1,10},∴集合A中没有:5,7,9,集合B中有:5,7,9,集合A、B中没有:1,10,综上,集合A中没有:5,7,9,1,10,集合B中没有:2,4,6,1,10,∴A={2,3,4,6,8},B={3,5What’s delicious to eat and comes in a
variety of colors? Eggplant! And no, it has nothing to do with chickens! This
strangely named vegetable is, however, as versatile as an egg.It can be steamed, fried, and
baked.It can be
eaten by itself or combined with meats and other vegetables.
Eggplant was first grown in India in the
5th century BC.Its
popularity soon spread to China and then throughout Asia.Finally, during the Middle Ages
the vegetable made its way to Europe.At that time, eggplant was not the shiny purple vegetable most
people know today.Instead,
it’s like a white egg.Due to this egg - like appearance, eggplant got its name.In its early days, the
vegetable was so bitter that people often called it a “mad apple.” This
nickname started because people believed its bitterness was bad for one' s
health.People
actually thought eggplant could cause madness and cancer.
Fortunately today people know that eggplant
doesn't cause insanity or cancer.In fact eggplant is so healthy that it may prevent cancer.In addition, the brain and the
heart benefit from this super vegetable.Since it's high in fiber, eggplant can improve digestion.
Italy, Turkey, Egypt, China and Japan are
the leading growers of eggplant in the world today.Depending on its location,
eggplant may be purple, green, orange or yellow - white.And it can be as small as a
tomato or as large as a cucumber.Dish varieties range from simple to complex, with all of them being
delicious.
Today, thousands of people gather in
Loomis, Calif, for the annual Loomis Eggplant Festival.The main activity at the
festival is eating delicious eggplant dishes.There is plenty more to do and see, though.Recipe contests, arts and
crafts, performers, races and children's activities all “egg – cite” festival -
goers.Most people
at the festival would agree—eggplant is an “egg—cellent” vegetable.
1.Eggplant got its name because of its
_____.
A.appearance
B.taste
C.color
D.value
2.Which of the following does NOT belong to
the qualities of eggplant?
A.It can be cooked in various ways.
B.It is easy to digest.
C.It can prevent cancer.
D.It is valuable and priceless.
3.Which of the following is true according
to the passage?
A.Eggplant can be eaten to cure cancer
B.Eggplant used to taste bitter.
C.India produce the most eggplant in the world today.
D.Eggplant has a history of nearly 1,000 years.
4.Most people come to the Loomis Eggplant
Festival to_____.
A.see arts and crafts
B.enjoy food with eggplants
C.take part in recipe contests
D.promote eggplant