检查轨腰螺栓孔裂纹的是:()
A、0°探头
B、45°探头
C、70°探头
D、侧打探头
参考答案:B
---Would you please help me carry the suitcase?
---____________.
A.My pleasure
B.With pleasure
C.Go ahead
D.By no means
— Lucy looks very healthy. Do you know _____?
— At least half an hour.[ ]
A. how often she exercises.
B. how many vegetables she eats every day
C. how much milk she drinks every day
D. how long she exercises every day