若9a=3a-6,则(a+5)2012=______.
∵9a=3a-6,
∴32a=3a-6,
∴a-6=2a,
解得:a=-6,
则(a+5)2012=1.
故答案为:1.
The book, which ____ for children under 10, was ____ with adults readers.
A.intends, familiar
B.is intended, popular
C.intends, popular
D.is intended, familiar
在狭水道,若船舶以高速行驶,船舶兴起的波浪使河岸产生一种斥力,其变化力()。
A、大致与船速相当,严重时可上升到船速的二次方
B、略小于船速的平方
C、远大于船速的平方,严重时可上升到三次甚至四次方
D、略大于船速的平方