多项式3x4y+7xy2﹣1﹣2x2y3按x的降幂排列为( ).
3x4y﹣2x2y3+7xy2﹣1
I______ him not to go there, that is, my advice was that he______ there, but he wouldn’t listen to me.
A.suggested; didn’t go
B.hoped; not go
C.wished; did go
D.advised; not go
电缆隧道应有充足的照明,并有()措施。
A.防水
B.防火
C.防风
D.防尘
E.通风