射线照相法适宜各种熔化焊接方法的对接接头和钢板、钢管的检测。
参考答案：错
---- Excuse me. Could you ________English in class?
---- Yes, of course. I am very good at _______ English stories.
A．say, talking
B．tell, saying
C．speak, telling
D．tell, speaking
右心衰竭时，产生水肿的始动因素是（）
A.毛细血管滤过压增高
B.毛细血管通透性增高
C.肾小球滤过率下降
D.血浆胶体渗透压降低
E.淋巴液回流受阻
