爆破应根据岩性、产状、()选择适当的爆破方法,严格控制药量。爆破后应达到边坡和堑顶山体稳定,基床和边坡平顺、不破碎、不松动;凸凹不平处应用浆砌片石补齐。
参考答案:边坡高度
The teacher couldn't make himself _____ attention to because the students were so noisy. [ ]
A. to pay
B. to be paid
C. paid
D. pay
寒潮带来的灾害性天气有( )
A.暴雨
B.冰雹
C.霜冻
D.干旱