(x>=1)&&(x<=10)&&(x>=1200)&&(x<=210)< /div>
B.
(x>=1)||(x<=0)||(x>=1200)|| (x<=210)< /div>
C.
(x>=)&&(x<=10)||(x>=1200)&&(x<=210)< /div>
D.
(x>=)||(<=10)&&(x>=1200)||(x<=210)< /div>
【单选题】材料的塑性好,则反映了弯曲该冲件允许( )
【单选题】能正确表示:当x的取值范围在[1,10]或[100,110]内为真,否则为假的表达式是( )
A.
(x>=1)&&(x<=10)&&(x>=100)&&(x<=110)
B.
(x>=1)||(x<=10)||(x>=100)||(x<=110)
C.
(x>=1)&&(x<=10)||(x>=100)&&(x<=110)
D.
(x>=1)||(x<=10)&&(x>=100)&&(x<=110)