喷砂清理可用来()
A.在清理表面上产生一个锚链状轮廓
B.经济的除去油和油脂
C.处理表面而不影响区域内其他工人的工作
D.不可用来进行上述工作
参考答案:A
Had Yeats stopped writing at age 40, probably he ______valued as a minor poet now.
A.would be
B.had been
C.is
D.would have been
导爆索产生盲炮的原因有哪些?