【简答题】Based on the DE of pectin, DE>50% is , DE<50% is ,
【单选题】英国是蒸汽机的故乡,......可是煤烟带给英国的灾难是将房屋......树木、雕塑、桥梁一切都熏成黑色,就连泰晤士河也不例外。......伦敦的烟雾中毒事件也是开世界纪录之先。材料表明( )
【简答题】write an essay based on the following table .In your writing you should 1) Describe the table, and 2) Give your comments You should write at least 150 words (15points)
【简答题】如图,⊙0是△ABC的外接圆,AD是⊙0的直径,DE⊥BC于E,AF⊥BC于F. (1)求证:BE=CF; (2)作OG⊥BC于G,若DE=BF=3,OG=1,求弦AC的长.
【单选题】If De Beers were a US-based company, it would be found in violation of anti-trust laws for fixing the prices of diamonds.
【简答题】A.uplift B.cheer C.future D.improvement
【单选题】Responding to an increase in demand for ______ soy-based products, corporate executives decided to lower prices.