合金过渡的目的有（）

A.补偿合金元素的损失

B.消除焊接缺陷

C.改善焊缝金属的组织和性能

D.保护

Woman: Are you prepared for the exam tomorrow

Man: Oh, yeah, the exam will be a piece of cake.

Question: What does the man mean().

A. The woman should take the exam.

B. The woman shouldn’t be concerned.

C. He is not worried about the exam.

D. He enjoys taking exams.