下列不能直接引爆铵梯炸药的是()。
A导爆管
B导爆索
C导爆管雷管
D火雷管
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露天矿台阶高度决定了孔深,而孔深不受钻孔直径的制约,当孔径确定以后,合理的孔深不可以提高钻孔和装药效率,因此台阶高度与钻孔直径没关系。()
&8226;you are an Assistant Sales Manager who has just handle the enquiry that Mr. Lin, Regional Sales Manager passed to you on Friday.
&8226;Write a memo to Mr. Lin.
&8226;Telling him that you have dealt with the problem
&8226;Informing him of the content of the enquiry from Mr. E. King who wants a special wholesale discount
&8226;Telling him the discount that you could offer to Mr. King
&8226;Write 40--50 words on a separate sheet.
炸药的爆力表示炸药爆炸时对介质产生的整体压缩、破坏和抛移的做功能力。()
漏斗体积同炸药埋置深度的关系是埋置深度由大变小时,漏斗体积由小变大,埋置深度为最适宜深度时,漏斗体积达到最大。()