从作品的风格和表现手法上看，《炉中煤》是一首
A．颂歌
B．战歌
C．牧歌
D．恋歌
参考答案：D
—What do you think of my shirt? It _______ cotton.
—I looks nice on you.[ ]
A. is made in
B. is made for
C. is made of
D. is made by
具有非特异性杀伤功能的细胞是（）
A.Th细胞
B.B细胞
C.NK细胞
D.Tc细胞
E.Ts细胞
