()钻进对孔壁及岩心破坏最大。
A.硬质舍金
B.钢粒
C.金刚石
参考答案:B
Because I _____ almost thirty hours, I ____ to stay over for a few days and rest.[ ]
A. had driven; decided
B. drove; had decided
C. was driving; decided
D. drove; would decide
“望色十法”中,“甚”指的是
A.面色浮显B.面色清明C.面色深浓D.面色壅滞E.面色润泽