某掘进过程中,一个循环的进度为1.2m,炮眼的深度平均为1.5m,掘进工作面的炮眼利用率为()
A.0.5
B.0.6
C.0.75
D.0.8
参考答案:D
_____ is mentioned above, the number of the students who would like to further their education abroad is
increasing.[ ]
A. Which
B. As
C. That
D. It
有关交界痣,下列哪种说法是错误的()
A.交界痣是指痣细胞集中分布在表真皮的交界位置
B.是指处于良、恶性交界状态
C.交界痣可发展为黑色素瘤
D.交界痣可分布于任何部位
E.交界痣应该手术切除