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- 1用所给动词的正确形式填空 They( )(not go)fishing on Sunday.
- 2一种商品售价80元,比过去降低了20元,降低了_%.
- 3火力发电厂是利用什么发电的?A势能B电能C化学能D光能
- 4简便算 8分之1十7分之4一(7分之4一8分之3
- 5This kind of apple trees_____ to plant in this area.A.is going B.is difficult 选B
- 6The favorite piace to buy a hamburger is a fast food restaurant什么意思?
- 7把铝粉和FeO配成铝热剂,分成两等份,前一份在高温下恰好反应,并将生成物和足量的盐酸充分反应.后一份直接加入足量NaOH溶液使之充分反应,前后两种情况下生成的气体在同温同压下的体积比是
- 8正方体的棱长之和是36米,求表面积和体积
- 9椭圆x2/a2+y2/b2 =1(a>b>0)的两焦点为F1(-c,0)、F2(c,0),P是以|F1F2|为直径的圆与椭圆的一个交点,且∠PF1F2 =5∠PF2F1,求e?
- 10I_____(not buy)a house last year.