【简答题】完成句子 1 .As ________________( 社会发展了)day by day ,with more and more advanced technology and ever -increased social wealth ,the nowaday world is totally different from ever before.(develop) 2 .Scientists...
【单选题】The government should be playing a more____role in promoting human rights.
【判断题】While promoting your phones, I get more excited than I ever gotten promoting other things.
【简答题】当电阻匹配,即 时,外电阻可获得最大功率。
【单选题】We are sparing no efforts to create _____ more peaceful and more advanced world, ____ place where everyone enjoys his life and freedom.
【简答题】设一组数据为x 1 ,x 2 ,x 3 ,…,x n ,各数据与平均数 . x 之______的平方的平均值,叫做这组数据的方差,记做s 2 .即s 2 = 1 n [( x 1 - . x ) 2 +( x 2 - . x ) 2 +…+( x n - . x ) 2 ] .
【单选题】-- The city of Wenzhou looks more and more beautiful. -- Yes. That’s because lots of trees ______ every year.
【简答题】设一组数据为 (1, 10, 55, 14, 68, 11, 27, 23, 29) ,散列函数是 H( key ) = key % 13 ,用链地址法解决冲突,设散列表的大小为 13(0 .. 12) ,试画出插入上述数据后的散列表。
【单选题】设一组数据的方差为s 2 ,将这组数据的每个数据都乘以10,所得到的一组新数据的方差是 [ ]