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“如果月球体积比地球大，那么雪是黑的。”是一个真命题.
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含有一条欧拉路的图称为欧拉图.
集合X上自反的，对称的，传递的关系称为偏序关系.
Confusable wordsFill in the blanks with the words above. Change the form where necessary. (必要时改变单词的形式)Group 1creep, climb, crawl1. It took several hours to drive the 50 miles, _______ along through the snow.2. She _____ into Chrissy's room, shutting the door silently behind her.3. Several fans ______ onto the roof of the arena to get a better view.4. Sales have 11% this quarter.5. The baby ____ across the floor.6. No one noticed that the little boy had _____ into the room and was sitting there, listening.7. Boys were _____ trees along the river bank.Group 2flock, herd, swarm8. She drove the _____ of cattle through the wilderness. 她赶着牛群穿过荒野。9. A _____ of ants are moving busily. 一群蚂蚁正在忙碌地搬家。10. A _____ of customers were waiting for the store to open. 一群顾客在等候着商店开门。11. A ______ of birds comes over, and the hunting starts.Group 3desert, abandon, give up12. We had to ____ the car and walk the rest of the way.13. The family refused to ____ any of their land.14. Mrs Hasan was _____ by her husband and had to support four children on her own.15. Many of the party's traditional voters _____ it at the last election.16. Bad habits are not easily _______.17. Because of the fog they ______their idea of driving.Group 4misfortune, disaster, calamity18. Natural _____ such as floods and earthquakes are common occurrences in California.19. It will be a ______ for farmers if the crops failed again.20. Her ____ worsened this year, when her company eliminated her position and she lost her job.21. Their expedition nearly ended in ____, when one of the climbers slid off the mountain.22. ______ never come single. 祸不单行。
大腿停球时，大腿肌肉要适当放松。
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