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Prolonging Human Life Prolonging human life has increased the size of the human population. Many people alive today would have died of childhood diseases if they had been born 100 years ago. Because more people live longer, there are more people around at any given time. In fact, it is a decrease in death rates, not an increase in birthrates that has led to the population explosion. Prolonging human life has also increased the dependency load. In all societies, people who are disabled or too young or too old to work are dependent on the rest of society to provide for them. In hunting and gathering cultures, old people who failed to follow the others were left behind to die. In times of famine, infants might be allowed to die because t A. the need to prolong the lives of old people B. the need to enrich the life of the retired people C. the need to build profit-making nursing homes D. the need to take care of sick and weak people [单项选择]During the past generation, the American middle-class family that once could count on hard work and fair play to keep itself financially secure had been transformed by economic risk and new realties. Now a pink slip, a bad diagnosis, or a disappearing spouse can reduce a family from solidly middle class to newly poor in a few months.
In just one generation, millions of mothers have gone to work, transforming basic family economics. Scholars, policymakers, and critics of all stripes have debated the social implications of these changes, but few have looked at the side effect: family risk has risen as well. Today’s families have budgeted to the limits of theirs new two-paycheck status. As a result, they have lost the parachuted they once had in times of financial setback—a back-up earner (usually Mom) who could go into the workforce if the primary earner got laid off or fell sick. This "added-worker effect" could support the safety net offered by unemployment insurance or disability A. The Middle Class on the Alert. B. The Middle Class on the Cliff. C. The Middle Class in Conflict. D. The Middle Class in Ruins. [单选题]制动器踏板自由行程过大会导致( )
A.制动不良 B.制动失效 C.制动跑偏 D.制动拖滞 [单选题]( )是改革发展新阶段求真务实的根本任务。
A.以人为本 B.落实科学发展观 C.实现政府转型 D.坚持发展成果由人民共享 [填空题]地质监督过程监督及质量控制要求，岩屑、钻井取心、井壁取心的( )结果记录在地质监督日志中。[每空1分]
[单项选择]
B 根据下面短文回答下列问题。The bus will not go to Boston. [A] True [B] False [单项选择]统一考录制度是指新招录公安民警，一律实行( )和人事部统一考试。公安部派人督考，切实严把“入口关”，从源头上保证队伍的基本素质。
A. 省级公安机关 B. 市级公安机关 C. 县级公安机关 D. 公安部 [判断题]射极跟随器的输出电阻大，输入电阻小。
[简答题]爱岗敬业的具体要求?
[单选题]户外10kV 及以上高压配电装置场所的行车通道上，车辆 （包括装载物）外廓至无遮栏带电部分之间的安全距离为（ ）m。
A.0.75 B.0.85 C.0.9 D.0.95 [多选题]在Excel中，更改当前工作表名称时，可以使用（）。
A.【文件】菜单的【重命名】命令 B.右击工作表名，选【属性】命令 C.【格式】→【工作表】→【重命名】命令 D.右击工作表名，选【重命名】命令 [单项选择]某上市公司职业经理人在任职期间不断提高在职消费，损害股东利益。这一现象所揭的公司制企业的缺点主要是（）。
A. 产权问题 B. 激励问题 C. 代理问题 D. 责权分配问题 [多项选择]室内外管道界限划分标准有（）
A. 给水管道人户处有阀门者以阀门为界（水表节点） B. 给水管道人户处无阀门者以建筑物外墙皮1.2m处为界 C. 给水管道入户处无阀门者以建筑物外墙皮1.5m处为界 D. 排水管道以出户第一个排水检查井为界 E. 排水管道以建筑物外墙皮1.2m处为界 [单项选择] Although there had been various small cameras developed, it was not until George Eastman introduced the Kodak in 1888 that the mass appeal of photography attracted America and Europe and thereafter spread quickly to the far corners of the earth. Eastman called his new famous camera the Kodak for no particular reason except that he liked the word. It was easy to remember and could be pronounced in any language.
An immediate consequence of Eastman’’ s invention was a blizzard of amateur photographs that soon became known as snapshots. The word came from hunters’’ jargon. When a hunter fired a gun from the hip, without taking careful aim, it was described as a snapshot. Photographers referred to the process of taking pictures as shooting, and they would take pride in a good day’’s shoot the way country gentlemen would boast about the number of birds brought down in an afternoon.
Photography became not only easy but fun because of the Kodak. Almost overnight photography bec
A. benefited the economy to a large extent. B. increased the efficiency of information conveyance. C. improved the understanding between human beings. D. All of the above. 我来回答: 提交
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