钨极氩弧焊焊接直缝通常采用左向焊法。
参考答案：对
.I was shocked to hear that your house_______into.
A．was breaking
B．had been broken
C．broke
D．has been broken
患者，女，58岁，心悸不安，胸闷心痛时作，唇甲青紫，舌质紫暗，脉结代，宜首选（）
A.莪术
B.三棱
C.丹参
D.水蛭
E.益母草
