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• 6. 比較下列化合物的酸性大小： I. Methanol II. Acetylene III. (CF3)2CHOH IV. (CH3)2CHOH(A) III ＞ I ＞ IV ＞ II (B) I
• 2. These two people see each other only once a year—at the _____ meeting of the community charityfou
• 3. He has been fasting for three _____ days. That’s more than 70 hours of not eating.(A) consecutive
• 4. The artist often draws _____ from ordinary scenes. He pays close attention to his surroundings an
• 5. Tom was punished for being _____. He didn’t arrive at school until 20 minutes after the class beg
• 6. Due to nervousness, he sweated _____ and needed to change his shirt during the event.(A) mentally
• 7. As the economy _____, the country is facing serious problems like increasing debts and rising pri
• 8. The use of anonymously-hosted fake news websites has made it difficult to _____ sources of fake n
• 9. Big data is a field that treats ways to analyze, systematically _____ information from, or otherw
• 10. Humans have a strong impulse to pay attention to danger, according to evolutionary psychology, b
• 11. You have a very _____ résumé, and we decided to hire you as our general manager.(A) doubtful (B)
• 12. John is about to _____ because he hasn’t eaten anything for nearly two days.(A) faint (B) bleed
• 13. My dream is to have my own _____ so that I can enjoy a sun bath or throw a barbeque party on tha
• 14. Lisa always wears jeans or pants, but today she showed up wearing a skirt. That’s quite _____.(A
• 15. This company offers great _____ to employees, such as paid leaves and medical insurance.(A) vaca
• 16. Riding a bike to school not only reduces air pollution but also _____ strong and healthy.(A) it
• 17. By ten o’clock tomorrow morning, she _____ her book report.(A) finishes writing (B) will have fi
• 18. Students today have much more freedom than _____ in the 60s or 70s.(A) that (B) whom (C) they (D
• 19. In addition to _____, the 16-year-old also writes lyrics for her favorite singer.(A) act (B) tha
• 20. Jenny _____ a shower when she heard someone knocking on the door.(A) was taking (B) took (C) has
• 21. Not until she saw her son _____ relax and go to bed.(A) she was able to (B) was she able to (C)
• 22. During the recovery from the great recession, from mid-2009 to 2011, small firms, led by the lar
• 23. _____ a hike, gauge your ability to do it based on distance, elevation gain (how many feet you’l
• 24. Success is to be measured not so much by the position that one has reached in life _____ the obs
• 25. Essentially, recreational activities are outdoor pastimes that you engage in mainly for your own