is known that those actions that people dislike go against the will of people. A.As B.It C.What D.That
将耳朵贴在长铁管的两端,让另外越高同学敲一下铁管的另一端,会听到两个敲打的声音。这个事实说明( ) A. 敲打在空气中形成了声波
检验一瓶长期暴露在空气中氢氧化钠是否变质,下列可作为检验试剂的是( ) A.稀盐酸 B.无色酚酞 C.紫色石蕊试液 D.水
若复数满足,其中i为虚数单位,则的虚部为 ( ) A. B. C. D.
西方法律大多继承了古罗马法。古罗马法规定的基本制度和原则,今天依然起作用的有
Are you a student in Pickering? Do you like to write? Can you imagine Pickering in the year 2025? If you say yes to these questions then you should enter the “In Your Words ”writing contest. You c
观察下列各式,完成下列问题。已知1+3=4=22,1+3+5=9=32,1+3+5+7=16=42,1+3+5+7+9=25=52,……(1)仿照上例,计算:1+3+5+7+……+99= 。(2)根