用表示集合S中的元素的个数,设
为集合,称
为有序三元组.如果集合
满足
,且
,则称有序三元组
为最小相交.由集合
的子集构成的所有有序三元组中,最小相交的有序三元组的个数为 .
阅读下面材料,在空白处填入适当的内容(不多于3个单词)或括号内单词的正确形式。
In my opinion, we should try our best (realize) our goals even though
is little hope. The efforts seem to be the lights in the darkness, leading the way to hope and success.
I used to be shy girl in my primary school. I was weak in English at that time, especially for
(speak) English. So I was afraid to answer the teacher’s questions during English classes. After I entered my dream middle school. Something
(change). I started to read many
(interest) English stories and my English teacher was patient to help me a lot. I studied hard in class and practiced by watching English films and listening to English songs in my free time. Little
little, I found
more and more interesting to learn English. I could even talk with my classmates
(fluent) in English and I was not shy any more. At last, I got high grades in English and I had
( confident) to do it better in the future.
My dear friends,
…
There isn't enough space here to thank everyone who has travelled on my journey with me, but I must thank those that have stuck with me through the highs and the lows and have helped me become the person that I am today.
THANK YOU TO:
My mother …
My father …
…
And lastly, to tennis fans in China! I am grateful to each and every one of youpushing me to be my best, embracing me and loving me
(conditional). There is no limit to
far we can take the sport of tennis in China, together.
When I started playing tennis, I was just a neighborhood kid an after-school hobby, not realizing what magical journey lay ahead of me.
my journey hasn't been easy, it has been rewarding. I
(see) change happening in front of my eyes, young girls picking up tennis racquets, setting goals and believing in
. I hope that I've had the opportunity
(inspire) young women all over China to pursue their goals with energy and self-belief.
you want to be a tennis player, a doctor, a lawyer, a teacher or a business leader, I urge you to believe in yourself and follow your dream. If I could do it, you can too! Be the bird
sticks out. With hard work, your dreams will come true.
Li Na
阅读下面材料,在空白处填人适当的内容(1个单词)或括号内单词的正确形式,并将答案填写在答题卡相应的位置上。
In the days when an ice cream cost much less, Tom, 8-year-old boy, entered a hotel coffee shop
sat at a table. A waitress put a glass of water in front of him. "How much is an ice cream?" "Fifty-cents," replied the waitress. The little boy pulled
right hand out of the pocket and studied a number of coins in it.
"How much is a dish of plain ice cream?" he asked. Some people were now waiting for her service and the waitress grew a bit (patience). "Thirty-five cents," she said
(rude). The little boy carefully counted the coins
. "I will have a plain ice cream," he said. The waitress walked
. The boy finished the ice cream, paid the cashier and left. It was not long
the waitress came back and then she began to wipe down the table and suddenly was surprised
what she saw. There,
(place) neatly beside the empty dish, were two nickels and five pennies --- her tip!
M: Are you pleased your new job? How is it going?
W: It’s great. I’m really (enjoy) it. The people are nice and I’m learning lots of new things. It’s a shame about the travel
.
M: Oh, why?
W: Well, it’s quite far from I live. I travel over
hour each way every day.
M: That’s quite a journey. Is there a direct route from your place?
W: No, (fortunate). I leave for work at about 7:30 am and catch the bus not far from my place. When I get to downtown, I have to get off
take the metro all the way up to north of the city. The ride
(last) about 30 minutes.
M: Well, can you read a paper a book?
W: , it’s the rush hour. It’s usually standing room only.
阅读下面材料,在空白处填入适当的内容(不多于3个单词)或括号内单词的正确形式。
Long ago there was a poor farmer called Fred. Fred and his wife Doris lived____ (happy) together in their small old house. One winter night, the Luck Fairy visited __
__.
“Fred, you’re a good farmer. I’d like to give you a wish,” said the Luck Fairy.
“A wish?” said Fred.
Fred and Doris smiled _each other. Then Fred said, “Thank you, Luck Fairy. We’re very healthy and happy.”
“You work very hard __ you make very little money. Would you like some gold coins?” asked the Luck Fairy.
“We’re poor, but we have enough food ___(eat).” replied Fred.
“You can use the gold coin to buy ____ clothes. The winter here is very cold, ” said Luck Fairy.
“ _____we haven’t got many clothes, we’ve got enough.” said Doris.
“Well, what about nice new house?” asked Luck Fairy.
“Thank you, but I love my small old house very much. I _______(live) here since I was born. We don’t need a new house, ” said Fred.
“You’re quite different ___ others. I like you very much, ” said the Luck Fairy. “I wish you happy forever.” Then the Luck Fairy disappeared and never came back.