In fig 1,ABCD is a quadrilsteral,E is a point the diagonal BD,EF∥AD,EM∥BC,then the value of is (英汉词典:fig figure的缩写,图;quadrilateral四边形;diagonal对角线;value数值;variable变量;to depend on取决于;position位置) 四边形ABCD中,E是对角线BD上一点,EF∥AD,EM∥BC,则的值为
A.
greater than 1(大于1)
B.
equal to 1(等于1)
C.
less than 1(小于1)
D.
variable depending on the position of E(不能确定,与E的位置有关)