下列哪项不是传染性非典型肺炎的早期特征（）
A.灰色肝变期
B.肺水肿
C.灶性肺水肿
D.透明膜形成
E.纤维素渗出
参考答案：C
小强在没有安全措施的情况下模仿跳伞动作，这种行为违背了（ ）
①无害原则 ②适度原则 ③安全原则 ④合法原则
A．①②
B．②③
C．①③
D．②④
What is the WBS typically used for
A) To organize and define the total scope of the project.B) To identify the logical person to be project sponsor.C) To define the level of reporting the seller provides the buyer.D) As a record of when work elements are assigned to individuals.
