在选取每米炮孔装药量的值以后,可以检验炮孔内能否装下计算的装药量,如果装不下,就要减少药量,或者()参数。
参考答案:缩小
—He plays basketball so well! Who taught _______?
—He learnt it by _______.
A. him; him B. him; himself C. himself; him
火山碎屑结构可分为()、火山角砾结构和火山凝灰结构。