—— Will another fifty be enough? —— Just twenty will＿＿＿＿.A. work B. do C. suit D. fit
当m=_______________时，函数y=(m-2)x m+1 是二次函数.
用所给词的适当形式填空【小题1】Doctors often tell us (drink) more water every day.【小题2】It’s easy for us (have) a good lifestyle.【小题3
My MP4 player isn’t in my bag. Where I have put it? A. can B. must C． should
(8分) 在氧化还原反应中，氧化剂______电子，发生的反应是_________反应；还原剂________电子，发生的反应是____________反应。铁与氯气反应的方程式为，2Fe+
One day an American friend invited me to a party． It wasn’t a real party, it was some kind of informal get-together． Since it was summer time, he had a cookout where most of his American friends
一个铀衰变为钍核时释放出一个α粒子，已知铀核的质量为3.853 131×10-25kg,钍核的质量为3.786 567×10-25kg,α粒子的质量为6.646 72×10-27kg.在这个衰变过程中释
关于下列图示的说法中不正确的是A．图①表示CO(g)+H2O(g)CO2(g)+H2(g)是放热反应 B．图②为电解硫酸铜溶液的装置，电解一段时间后，加入一定量的Cu(OH)2一
