(x﹣1)(2x+3)
解:
(x﹣1)(2x+3),
=2x2+3x﹣2x﹣3,
=2x2+x﹣3.
试述中晚期妊娠的诊断依据。
Our new product is based on a ( )concept.
A.ordinary
B.newest
C.excellent
D.traditional