喷浆支护前,按检查巷道断面,清基、挖地槽,并安设()。
参考答案:标志
铸造固定桥桥体常采用的焊接方法是
A.转移焊接法B.前焊接C.后焊接D.离模焊接法E.连模焊接
"Goodbye, then, "she said, without even ______ from her book.[ ]
A. looking down
B. looking up
C. looking away
D. looking on