The figure of speech the author employed in the sentence “I look up and see the morning star keeping white watch over a white world.” is _________.

A、单位长度井段内工具面角的变化
B、单位长度井段内井斜角的变化值
C、单位长度井段内全角的变化值
D、单位长度井段内磁偏角的变化值

A.枕左前
B. 枕右前
C. 枕左横
D. 枕右横
E. 枕左后

A、闷黄
B、揉捻
C、炒青
D、烘干