Please _____ the light when you leave.[ ]
A. turn on
B. turn off
C. turn up
D. turn down
答案:B
脉络膜黑色素瘤应与下列哪种肿瘤相鉴别()
A.视网膜母细胞瘤
B.脉络膜血管瘤
C.Coats病
D.眼球转移性肿瘤
E.脉络膜骨瘤
The “Backbone of England” refers to the ()