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Every year, about 6.5 million people die because of air ________(pollute).
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落霞与孤鹜齐飞,____________。(王勃《滕王阁序》)
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含羞草的叶子被碰后会合拢,这说明生物具有 [ ] A.生长现象 B.应激性 C.繁殖 D.呼吸
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用所给词的适当形式填空 1. There are so many people in the street! It is really too ____ (crowd), isn't it?
1年前
先化简,再求值:(X+2Y)(X-2Y)-(2X-Y)(-2X-Y),其中X=8,Y=-8
1年前