W: Are you still teaching at the junior high school
M: Not since June. My brother and I opened a restaurant as soon as he got out of the army.
Q: What do we learn about the man from the conversation().

A. He quit teaching in June.

B. He has left the army recently.

C. He opened a restaurant near the school.

D. He has taken over his brother’s business.

关于锻造工艺特点，不正确的叙述是（）。

A.可以消除某些缺陷，提高机械性能

B.成本高于铸造工艺

C.毛坯因接近零件尺寸形状而省料省时

D.可以获得形状复杂的锻件