题型:填空题 Stand at the top of the mountain,and thenyou'll get a better ____ of the town. [ ]A. sight B. view C. scene D. scenery 查看答案
题型:填空题 高压钢管焊接时,当其管壁厚度在20~60mm之间,其坡口形式应为()。A.X形坡口无钝边B.J形坡口无钝边C.V形坡口,坡口根部有2mm左右厚钝边D.U形坡口,坡口根部有2 mm左右厚钝边 查看答案