,
且倾斜角为45°,则m的值为( )
C . 1
D .

8厘米5毫米=毫米.

;
.
,
(单位:元)与入园次数
(单位:次)的函数关系如图所示.当x满足时,
.
,
,
,若
,则
.
Mr. Martin: What's your favourite?
Chen Jie: Spring my favourite.
Mr. Martin: Why do you spring?
Chen Jie: Because I fly. Which do you like?
Mr. Martin: I like winter. When it snows,I can a snowman.
B . b÷
C .
÷b
①A对B的压强是多大?②桌面受到砖的压强是多大?
