日积月累。
扌____( ) 钅____( )
____( ) ____( )
拍(拍打) 护(看护) 钟(钟表) 针(别针)
Li Lida became the youngest person ever to cross the channel () Hainan Island and the mainland.
A.among
B.between
C.from
D.near
折射仪不可获得的信息()
A.宝石的各向同性或异性
B.所以宝石的光性及轴性
C.所有宝石的折射率