【单选题】I know him well enough to accept his explanation______.
【单选题】When I came into the room,he pretended ________ his homework.
【判断题】流体流动过程中阻力损失是由静压能提供的。 ( )
【单选题】在实数范围内分解因式x 5 -64x正确的是( )
C.
x(x 2 +8)(x+2 2 )(x-2 2 )
【单选题】I didn't know him well.I __never met him before.
【单选题】在有理数范围内,把x 4 -64分解因式正确的是( )
C.
(x 2 +4x+8)(x 2 -4x+8)
【单选题】在实数范围内分解因式x 5 ﹣64x正确的是 [ ]
【单选题】马小虎同学做了一道因式分解的习题,做完之后,不小心让墨水把等式:a 4 -■=(a 2 +4)(a+2)(a-▲)中的两个数字盖住了,那么式子中的■、▲处对应的两个数字分别是( )