—I think it is .
A:sadness and beauty
B:sad but beautiful
C:the most moved
D:sadness but beauty
风形成的直接动力是( )
文学常识和名著阅读。
多年前,内蒙古乌拉特前旗杨树林场的光肩星天牛泛滥,科学家为此引进了几百只以天牛幼虫为食的大斑啄木鸟.现在,林场中很少再见到光肩星天牛了.这种现象叫做( )
He's never ________class.