荧光探伤是用来发现各种焊接接头的表面缺陷,常作为()的检查。
A、大型压力容器
B、小型焊接结构
C、磁性材料工件
D、非磁性材料工件
参考答案:D
给图片找出相应的句子。
A. It's time to go to school.
B. It's time for math class.
C. It's six o'clock.
D. Lunch is ready.
E. I have an English class on Monday.
F. I like music class.
企业要想维持正常偿债能力,利息保障倍数至少应该()。
A.小于0.5
B.大于0.8
C.大于1
D.大于2