A: Good morning. I’d like to speak to Mr. Adams, please. This is Edward Miller at the Sun Valley Health Center.
B: ().

A. Mr. Miller, my husband isn’t at home. I can give you his business phone if you’d like to call him at work, though.

B. My husband is not here. What’s the matter

C. Oh, I’m his wife. May I take a message

D. This is Mrs. Adams, my husband is out, you can talk to me.

数控机床机械结构特点是（）。①高刚度②高抗振性③低热变形④高的进给平稳性

A、①③

B、①②④

C、①②③

D、①②③④