山谷季风
参考答案：
由于山谷及其附近空气之间的热力差异而引起白天风从山谷吹向山顶，夜晚从山顶吹向山谷。
Nearly all the streets are in straight lines, _____ from east to west. Those _____ run from north to south are
called avenues. [ ]
A. running; that
B. run; who
C. running; who
D. run; that
直肠指诊有脓血的可能是（）
A.直肠癌
B.肛裂
C.直肠息肉
D.肛瘘
E.内痔
