采掘工作面风流中氧气浓度不得低于18%。()
参考答案:错
— What do you think of your trip to Yunnan?
— I really enjoy it. I didn't expect it was wonderful.[ ]
A. as
B. more
C. most
D. very
患者胞睑灼痒肿痛,皮色红赤,渗出粘液。
根据症状,其诊断是()。
A.风赤疮痍
B.睑弦赤烂
C.目赤烂弦
D.风弦赤烂
E.迎风赤烂