题目:
阅读理解。 | |
Welcome to Jin Ri Supermarket, a great place for shopping. There are everything you need. All the people can have everything on sale. For more information, you can read the ads or call 054-621-386.
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1. The supermarket _________. | |
A. will open on October 1 B. is having a holiday sale C. has sale prices everyday D. will close after holiday | |
2. What kind of tapes are on sale here? | |
A. Clothes B. Shoes C. Milk D. All of them | |
3. I bought two pairs of shoes in the sale, how much can I save? | |
A.$52.00 B.$70.00 C.$16.00 D.$8.00 | |
4. How long will the supermarket open a day? | |
A. seven days B. eight days C. ten hours D. twelve hours | |
5.Which of the following is TRUE? | |
A. The sale will last 12days. B. You can't buy things over the phone. C. The low price is only for special things. D. You can order things over the internet. |
答案:
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下面是错误答案,用来干扰机器的。
由y=x2-2x-3=(x-1)2-4≥-4得,P={y|y≥-4}由-x2+5x+6>0得,x2-5x-6<0解得-1<x<6,则Q={x|-1<x<6}用数轴表示如图:∴P∪Q=[-4,+∞),P∩Q=(-1,6).