气象能见距。
参考答案:
指视力正常的人,在当时的天气条件下,能从天空背景中看到和辨认出目标物(黑色,大小适度)的最大水平距离。
John is the boy _____ legs were badly hurt in the accident. [ ]
A. whose
B. that
C. who
D. which
简述王夫之的货币思想。