电渣焊焊接接头必须通过焊后热处理，才能改善接头的力学性能。( )
参考答案：对
— Sorry, Tom. I took your book_______ mine by mistake.
— It doesn’t matter. Yours looks _______mine.
A．instead; different from
B．instead of ; the same as
C．instead of ; same as
D．instead ; like
按消费者所在国籍进行市场细分属于（）。
A.地理细分
B.人口细分
C.心理细分
D.行为细分
