信息披露义务人可以向大型机构投资者先行披露有关投资信息。（）
参考答案：错
Tom was _____ to finish making the model in an hour, but in fact, it took two hours.
A．supposed
B．regarded
C．refused
D．missed
作为X线照片影像的可供诊断的密度范围是（）
A.0.5～1.0
B.0.5～2.0
C.0.25～2.0
D.0.25～2.5
E.0.5～2.5
