燃气管道强度试验前,埋地管道回填土宜回填至管上方0.5m以上,并留出()。A、管道转

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问题:

燃气管道强度试验前,埋地管道回填土宜回填至管上方0.5m以上,并留出()。

A、管道转弯处

B、焊接口

C、三通

D、四通

考点:燃气具安装维修工考试燃气具安装维修工考试题库
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Each year in the United States more people are killed or injured in accidents—at home, at work or school, at play, or while traveling—than were killed or injured in the Vietnam war. In the early 1990s, about half of these accidental deaths were the result of motor-vehicle accidents. Other major causes of accidental deaths were falls, fires, and poisoning. On a worldwide basis, accidents involving motor vehicles are the primary cause of accidental deaths, followed by accidents in industry and in the home.
Efforts to lessen or to eliminate the hazardous conditions that cause accidents are known as safety measures. Safety is a growing concern around the world, and safety skills fire being taken more seriously today than ever before People have Come to realize that safety skills can be learned, and most safety experts agree that it is possible to predict, and take steps to prevent, the majority of accidents. Few accidents simply "happen". Most are caused by ignorance, carelessness, neglect, or lack of skill.

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尺规作图中的平分已知角,是根据构造两个全等的三角形而来的,由作法可知,判断所构成的两个三角形全等的依据是 [ ]

A.SAS

B.ASA

C.AAS

D.SSS

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男性,50岁,既往乙型肝炎病史二十余年,今晨突然发生呕血,色鲜红,量约1500ml,急至医院就诊,查体:BP80/50mmHg,P106次/分,面色苍白,四肢末梢凉,脾于肋缘下5.0cm,触及移动浊音(+),腹壁可见静脉曲张,至医院后患者又呕血一次,量约300ml。

不恰当的治疗方法()

A.三腔两囊管压迫

B.血管加压素静点

C.急诊剖腹探查

D.输血

E.纤维胃镜介入治疗

F.止血

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施工升降机的安装作业范围应设置警戒线及明显的()。非作业人员不得进入警戒范围。

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(7—9题共用题干) 患者男性,45岁,3天前车祸伤及头部,头痛、呕吐逐渐加重。用力咳嗽后突然不省人事,查体见患者呈昏迷状态,左侧瞳孔散大,对光反应消失,眼底视 * * 水肿,右侧肢体瘫痪,呼吸血压不稳。

患者最可能出现了

A.枕骨大孔疝

B.右侧颞叶疝

C.左侧颞叶疝

D.大脑镰下疝

E.原发性脑干损伤

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