一个数加上8的和乘2,积是287,这个数是多少?(用方程解)
设这个数为x,
(x+8)×2=287
x+8=143.5,
x=135.5.
答:这个数是135.5.
—Huang, would you mind if I ______ your Pipa for the coming competition?
—_________.
A. used; Yes, of course you can
B. use; Certainly, please use it
C. used; No, go ahead
D. use; No, you can't use it
开挖沟槽深度较大时,应合理确定分层开挖的深度,如人工开挖每层的深度不宜超过( )m。
A.1B.1.5C.0.5D.2