对直径8~10mm的普通圆钢进行焊接,不适宜的焊接方法是下列的( )焊。
A.电渣压力
B.气压
C.点
D.电弧
参考答案:A
用所给词的适当形式填空。
1. Look! Whose _______ (Walkman) are these? Perhaps they are the twin's.
2. Is there an _______(electric) shop in your town?
3. Amy wants to buy some presents for _______ (they).
4. Do you understand the _______(mean) of the new world?
5. Do you like to have cold _______(drink)?
结构面密集程度由裂隙度()与切割度Xe表征。