54+627-3(24-6),
=32•333-3(26-6),
=2-32,
=-22.
The new books are of great use, they _____ well and _____ already.
A.sell : sell out
B.sold : had sold out
C.sold : have sold out
D.sell : have been sold out
颞下颌关节急性不可复性盘前移位(如示意图)的主要症状是()
A.张口受限
B.疼痛
C.关节弹响
D.开口型异常
E.关节区肿胀