商品开发
参考答案:
商品使用价值的延伸、升级或创造。
患者,男,30岁,缺失,间隙较小,可摘义齿修复,不能排成品牙,可雕刻蜡牙。的形态特点是()
A.颊面外形类似上颌尖牙的唇面
B.颊面中央有颊嵴
C.舌面比颊面小得多,最突处在颈1/3处
D.面为四边形,近缘嵴<远缘嵴
E.中央窝内有二点隙和中央沟
--- Can you lend me the book Gone with the Wind?
--- Sorry, I returned it to the library just now. Maybe it is still ____.
A.available
B.affordable
C.acceptable
D.valuable