当前所谓新概念武器中理论最成熟、发展最迅速、最具实战价值的是（）
A.大气武器
B.生化武器
C.激光武器
D.等离子武器
参考答案：C
–-- Can you tell me __________ ?
----Sorry , I don’t know . I was not at the meeting , either .
A．what does he say at the meeting
B．what did he say at the meeting
C．what he said at the meeting
D．what he says at the meeting
对优质碳素钢，要求磷的含量控制在（）以下。
