英语周报高一b版21期答案

36.(15分,除标注外每空2分)1)同位素示踪法(1分2)碳碳双键(1分)、醚键〈1分C(1分)2(1分(3)加成反应(1分)CH-C=0+ CH3CHOH-CH3,CH3[答CH2=C=O+CHCH2OH→CH=C(OH)oCH2CH2也给分4)大于(1分氧原子半径较碳原子小,C=O键长更短,键能更大(合理答案均可)N或合理答案均可,不标注13C也给分)40

写作Paragraph 1: Jatin looked up and saw the other boys rushing ahead Refusing togive up at this point, he jumped to his feet and ran as fast as he could. Hedashed across the finishing line and won the fourth prize. Thinking he would lether sister down, Jatin couldn t help sobbing. Just then he suddenly heard theannouncement from the broadcast that he won the thirdprize as the runner whocollided with Jatin was disqualified for breaking the rule. holding the shoes closeto his chest during the award ceremony Jatin felt overjoyed and relieved as heeventually won the shoes for his sister.(要点1 Jatin获奖)Paragraph 2Filled with pleasure, Jatin walked home quickly.(高分句型一) He could notwait to see his sister and share the good news. On his arrival, Jatin found Zahrawas waiting outside. Nervous and anxious, Zahra wondered whether herbrother had brought her what she was expectingZahra, see what i have gotfor you. Jatin said excitedly taking the prize out of his bag with his tremblinghands. The instant Zahra saw the shoes, her face lit up. So thrilled was shethat she threw herself at Jatin.(高分句型二)" Thank you!ltin." Tears of joywelled up in their eyes as the brother and the sister hugged tightly together (4 R2把奖品给妹妹)

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