Mr Black often _____ fishing on Sundays, _____ he ? A. goes…doesn't B. goes…isn't C. doesn't go…does D. doesn't go…is
The hospital burn unit is a popular place on the day after Thanksgiving. I found that out three years ago, when my 18-month-old daughter touched a radiator pipe while playing around our friends' farmh
下列反应中硫酸既表现了氧化性，又表现了酸性的有（ ） A．2H2SO4（浓）＋CuCuSO4＋2H2O＋SO2↑ B．2H2SO4（浓）十CCO2↑＋2H2O＋2SO2↑ C．H2SO4（浓）＋NaClN
体操运动员桑兰在训练中不慎摔下了高低杠，造成脊髓横断，尽管她的下肢没有受到任何损伤，却丧失了运动功能，原因是
“我看不到春花，看不到秋叶，没有季节之流转……色彩、植被、山脉、村落及整个大地，都毫无变化，让我失去了时间意识。在这里，雨直
国家统计局公布的最新数据，2007年11月，我国居民消费价格指数（CPI）上涨6.9%，创10年来最高纪录，远远超过国际公认的3%的警戒线。回答问题。 CPI高
某化学兴趣小组对“NaOH溶液与稀盐酸是否恰好完全反应”进行探究。请你参与他们的探究活动，并回答有关问题。【实验探究】（1）方案一：某同学按
Although the first part of the book is easy， the rest ______. A. are difficult B. has proved difficult C. is supposed difficult
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