瓦氏(Water)位摄影,听眦线与台面的角度是
A.12°
B.18°
C.23°
D.37°
E.40°
参考答案:D
解析:瓦氏位摄影时,要求听眦线与暗盒的角度呈37°角。
4.9×0.96的积有______位小数;675.86÷0.65,商的最高位在______位上.
— _____ do you go hiking?
— Once a week. [ ]
A. How much
B. How often
C. How long
D. How soon