焊缝轴线与试样纵面垂直时的弯曲是()
A.面弯
B.根弯
C.侧弯
参考答案:C
I stood there wanting to ask more questions but found that was not the time.
A.appropriate
B.typical
C.accurate
D.effective
下列属于洋务运动时期创办的民用工业是( )
A.江南制造总局
B.安庆内军械所
C.轮船招商局
D.福州船政局