一般来说，近地层大气的直接热源是（）
A.太阳短波辐射
B.地面长波辐射
C.上层大气导热
D.上层大气辐射
参考答案：B
The potato chips are not _____ for me to eat. [ ]
A. thin enough
B. enough thin
C. well enough
古代理水之法有阻、隔、破。( )
