单项选择题
A.29.31B.43.40C.22.24D.15.17
A.He got a credit card of his friend and come to ask how to use it.B.He got a card and did not know whose card it is.C.He has lost his credit card and come to ask what to do.D.He has found a credit card and come to ask what to do.
A.大比例尺B.中比例尺C.小比例尺D.中小比例尺