| At the present time, 98 percent of the
world energy consumption comes from stored sources, such as fossil fuels or
nuclear fuel. Only hydroelectric and wood energy represent completely renewable
sources on ordinary time scales. Discovery of large additional fossil fuel
reserves, solution of the nuclear safety and waste disposal problems, or the
development of controlled thermonuclear fusion will provide only a short-term
solution to the world’s energy crisis. Within about 100 years, the thermal
pollution resulting from our increased energy consumption will make solar energy
a necessity at any cost. Man’s energy consumption is currently about one part in ten thousand that of the energy we receive from the sun. However, it is growing at a 5 percent rate, of which about 2 percent represents a population growth and 3 percent a per capita energy increase. If [判断题]凡是能与它的镜象重合的分子，就不是手性分子，就没有旋光性
A.正确 B.错误 [单选题]热辐射是以( )形式传递热量的。[易]
A.光波 B.电磁波 C.介质流动 D.物体接触 [单选题]触电伤员脱离电源后，正确的抢救体位是（ ）。
A.左侧卧位 B.右侧卧位 C.仰卧位 D.俯卧位 [单选题]靠近线路堆放道砟、片石、砂子等线桥用料，料堆的坡度不得陡于( )。
A.1：1 B.1：1.25 C.1：1.5 D.1：1.75 [多选题]《电力安全事故应急处置和调查处理条例》第八条规定:事故发生后,事故现场有 关人员应当立即向发电厂、变电站运行值班人员、电力调度机构值班人员或者本企业现场负 责人报告。有关人员接到报告后,应当立即向上一级电力调度机构和本企业负责人报告。本 企业负责人接到报告后,应当立即向( )报告。
A.国务院电力监管机构设在当地的派出机构(事故发生地电力监管机构) B.县级以上人民政府安全生产监督管理部门 C.国家电网公司安全生产监督管理部门 D.热电厂事故影响热力正常供应的,还应当向供热管理部门报告 E.事故涉及水电厂(站)大坝安全的,还应当同时向有管辖权的水行政主管部门或者 流域管理机构 [单选题]进行地面沉陷观测，提供符合矿井情况的有关( )参数；
A.回填高度 B.沉降 C.位移 D.岩移 我来回答: 提交
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