刻面型宝石增加重量的途径主要有（）.
参考答案：增加腰部直径、增加腰部厚度、增加亭角
The policeman are looking for people________the accident which happened last night. [ ]
A. referred to
B. related to
C. linking to
D. connecting to
现在，世界通用的阿拉伯数字的发明者是( )。
A．古阿拉伯人 B．古埃及人 C．古希腊人 D．古印度人
