“西湖春色归，春水绿于染”的原因是（）
A.西湖水质受到了污染
C.气温升高，藻类大量繁殖
B.岸边的绿色倒映在水中
D.苔藓植物漂浮在水面上
参考答案：C
By the time I swa the angry expression on his face, I ______ exactly what I was having to face. But not for a moment _______ I should quit.
A．had known; I thought
B．have known; had I thought
C．would know; I would think
D．knew; did I think
固体熔化时必须破坏非极性共价键的是 ( )
A．冰
B．晶体硅
C．溴
D．二氧化碳
