()是由于围岩的塑性变形和破裂,围岩向巷道空间位移,使支护结构受到的压力,是变形围岩压力的主要形式。
参考答案:塑性变形压力
— How about putting some pictures into the report?
— ______ A picture is worth a thousand words. [ ]
A. No way.
B. Why not?
C. All right?
D. No matter.
传统点火系火花塞跳火时,断电触点正处于()状态。
A.刚张开
B.刚闭合
C.张到最大间隙