4.5×(1-320),
=4.5×1720,
=3.825(元);
答:现在的成本是每件3.825元.
Something _______ wrong with the machine, and it _______ not work.
A.being; could
B.going; should
C.were; might
D.went; would
青光眼滤过性手术后的并发症通常不包括()。
A.浅前房
B.恶性青光眼
C.视网膜脱离
D.脉络膜脱离
E.并发性白内障