肺出血性梗死的原因有
A.组织疏松
B.双重血液循环
C.严重淤血
D.动脉呈树枝状分布
参考答案:A,B,C
解析:肺出血性梗死的原因有组织疏松;双重血液循环;严重淤血。
Frapping lines are fitted to lifeboat davits to().
A.secure the lifeboat in the davits when in the stowed position
B.bring the lifeboat close along the rali in the embarkation position
C.give the occupants a safety line when the boat is being lowered from the embarkation level
D.reduce the swinging of the lifeboat at the embarkation level
项目立项后的前期工作费,由建设单位负责使用和管理,按( )规定的条款支付。
A.年度投资计划
B.基本建设支出预算
C.批准的前期工作内容
D.勘查设计合同