吗啡的解毒药是（）
A.小剂量亚甲蓝
B.阿托品
C.二巯丙醇
D.依地酸二钠钙
E.纳洛酮
参考答案：E
They were busy ________ an experiment when I came.
A．doing
B．to be doing
C．with doing
D．to do
下列骨骼不参与眼眶构成的是()
A．筛骨
B．蝶骨
C．腭骨
D．颞骨
E．上颌骨
