缩窄性心包炎CT最主要的征象是____________，约在________mm，呈弥漫性。
参考答案：心包增厚、 5～20
It was reported that a plane crash happened last night and most of the passengers were badly_______ and some 10 died.
A．damaged
B．in jured
C．destroyed
D．harmed
在建设工程风险事件发生前，风险管理的目标有( )。
A．使实际损失最小
B．使潜在损失最小
C．减少忧虑及相应的忧虑价值
D．满足外部附加义务
E．承担社会责任
