维生素A的特点不包括（）
A.对酸和碱稳定
B.脂肪酸败可引起严重破坏
C.摄入过多可引起中毒
D.是黄素酶的辅酶成分
E.抗氧化作用
参考答案：D
Never in my wildest dreams _________ lead to a career in the NBA,which has allowed me to give back to my people in Africa.
A．I thought the chance would
B．I thought would the chance
C．did I think the chance would
D．did I think would the chance
为了获得高保真的的胶印产品，应使用（）。
A.PVA版
B.PS版
C.多层金属版
D.无水平版
