三米直尺测平整度时,塞尺刻度分辨率()
A.大于等于0.2mm
B.大于等于0.1mm
C.小于等于0.2mm
D.小于等于0.1mm
参考答案:C
What is the air______to London?[ ]
A. charge
B. pay
C. cost
D. fare
不真空