A.船桨
B.龙舟
C.小丽或小芳
D.湖水
答案:D
I along the road when I saw Peter. So we stopped and had a chat.[ ]
A. walked
B. was walking
C. would walk
D. had walked
锻件超声波纵波检测的起始灵敏度调整通常是()
A、只采用对比试块法
B、只采用底波方式法
C、可以采用对比试块法或底波方式法