金属的性能包括使用性能和()性能。
A.力学
B.物理
C.化学
D.工艺
参考答案：D
—I must be off now，or it will be too late to see Tom.
—________？Do you really want to see that dull boy?
A．So what
B．For him
C．Why so
D．For what
CIP
