未分类题

[背景资料]
某水泥厂生活区建设项目包括一栋三层食堂和会议室、六层宿舍楼。食堂和会议室的
建筑面积为1 872.2平方米,宿舍的建筑面积为1450平方米。食堂会议室楼为现浇混凝土框架结构,按6度抗震设防,抗震等级为4级。工程采用天然地基,根据地质勘探资料,其承载力标准值为230 kPa。基础为独立基础。宿舍楼为混凝土框架结构,按7级烈度设防。现场施工时应设安全警示牌。
[问题]
安全警示牌由什么构成?安全色有哪几种,分别代表什么意思?安全警示标志怎样构成?设置安全警示标志的“口”有哪几个?

A.2平方米,宿舍的建筑面积为1450平方米。食堂会议室楼为现浇混凝土框架结构,按6度抗震设防,抗震等级为4级。工程采用天然地基,根据地质勘探资料,其承载力标准值为230

【参考答案】

安全警示牌由各种标牌、文字、符号以及灯光等构成。一般说来安全警示牌包括安全色和安全标志。安全色有红、黄、蓝、绿四种颜色分......

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单项选择题
Year after year a dedicated Swedish chemist worked to find a substance which, when【C1】______nitroglycerine (硝化甘油), would make explosives safer to handle【C2】______weakening their force. He had a personal【C3】______scientific reason to pursue his search, because his【C4】______brother had been killed when a can of nitroglycerine【C5】______exploded. The oily liquid had been 【C6】______for so many disasters that its【C7】______ had finally been outlawed by many countries. While【C8】______a new formula one morning, the doctor broke a test tube and gashed (划开) his finger. He was daubing (涂搽) the【C9】______with collodion (火棉胶), a coating solution of gun-cotton dissolved in ether-alcohol (乙醚),【C10】______the idea struck him —mix collodion with the nitroglycerine!【C11】______was the answer. The new mixture,【C12】______blasting gelatine (爆胶), was not only【C13】______safe to handle as dynamite, but it was also one-and-a-half times more powerful! In fact, so powerful 【C14】______ that it paved the way for a whole new【C15】______in construction and engineering. Mines were【C16】______, roads were built, and canals were cut at a speed once【C17】______impossible. It had another use, also —death and destruction in warfare. Its inventor had believed that the power of his new【C18】______ would so awe the military mind that it would actually be a deterrent (威慑物) to war.【C19】______it became a weapon that brought death to millions of soldiers and【C20】______.【C1】A.mixing withB.mixed withC.was mixing withD.was mixed with
A.
B.【C19】______it
C.
【C1】
A.mixing
D.mixed
E.was
F.was