【单选题】(-4a-1)与(4a-1)的积等于( )
【简答题】(1)计算: (-1 ) 2 - 16 +(-2 ) 0 (2)解方程:(x-4) 2 =16.
【简答题】数字转换(1)(10010111)2 = ( )16 = ( )10, (2)(11011101)2 = ( )16 = ( )10(3)(0.01011111)2 = ( )16 = ( )10,(4)(11.001)2 = ( )16 = ( )10[填空(1)]A. ( 1 ) (10010111) 2 =...
【简答题】计算: (1)﹣16+23+(﹣17)﹣(﹣7); (2)(﹣ )+(﹣ )﹣(﹣ )﹣(+ )﹣(﹣ ) (3)(﹣ + ﹣ )×(﹣16) (4)﹣1 4 +(1﹣0.5)× ×〔2﹣(﹣3) 2 〕
【判断题】圆锥销装配时用铜锤打入后,锥销的大端可以稍微露出或平于被连接件表面。
【简答题】(1) 144 + 16 - 3 -1 - 3 8 (2)16x 2 =25.
【简答题】化简求值: ( x 2 -16 x 2 +8x+16 + x x-4 )÷ 1 x 2 -16 ,其中x= 2 +1.
【单选题】儿童对一类刺激物注意得多,而在同样情况下对另一类刺激物注意得少的现象是( )
【单选题】(-4a-1)与(4a-1)的积等于 [ ]
【简答题】数字转换 ( 1 ) (10010111) 2 = ( ) 16 = ( ) 10 , ( 2 ) (11011101) 2 = ( ) 16 = ( ) 10 ( 3 ) (0.01011111) 2 = ( ) 16 = ( ) 10 ,( 4 ) (11.001) 2 = ( ) 16 = ( ) 10 [填空(1)]A. ( 1 )...