焊缝的辅助符号，是为说明焊缝的某些特征而采用的符号。( )
参考答案：错
It's very kind you lend your bike to me. [ ]
A. of, to
B. for, in
C. for, to
D. of, in
浸渍工段双螺条混合机夹套温度是（）。
