假如让你选择人工股骨头的材料,你选择的是
A.316型不锈钢
B.钛合金
C.钴铬钼合金
D.钴镍铬钼合金
E.钛钴钼合金
参考答案:C
解析:[解题思路] 钴铬钼合金耐磨性好。
The captain stood by the window, _____ he could see the top of the tower.
A.where
B.from which
C.from where
D.which
工序余量