| There is no doubt that we are living in
a period of enormous population growth. In the past, it{{U}} (51)
{{/U}}thousands of years for the world’s population to double in size.{{U}}
(52) {{/U}}today there are more people having families and fewer
deaths from diseases. As(a){{U}} (53) {{/U}}, the population doubles in
only 35 years. A(n){{U}} (54) {{/U}}supply of food is only one of the
human needs that must be{{U}} (55) {{/U}}. Overcrowding has a highly
undesirable effect on life. For example, if every available piece of land were
used for producing food, it would be very difficult to{{U}} (56)
{{/U}}proper housing for people, as would health care and recreation.{{U}}
(57) {{/U}}these reasons, more governments are helping families to
understand the problems of{{U}} (58) {{/U} A. excessive B. adequate C. great D. small [单选题]合格的消防水带，其实际长度不得小于水带标称长度（ ）。
A.1M B.2M C.3M D.0.5M [单选题]助理值班员接发列车发现装载的货物窜动，超过机车车辆限界时，应通知( )采取紧急停车措施。
A.司机 B.运转车长 C.邻站值班员 D.列车调度员 [单选题]建筑施工现场的围挡高度，一般路段应高于（ ）。
A.1.5m B.1.8m C.2.0m D.2.5m [单项选择]太阳绕银河系重心绕一圈，需要的时间是（）
A. 1亿年 B. 10亿年 C. 5.5亿年 D. 2.5亿年 [判断题]在检修场所对邻近的带电设备装设临时遮栏是用来防止工作人员碰带电设备保证安全的技术措施。
A.正确 B.错误 [单选题]齿轮在轴上固定.当要求配合过盈量很大时.应采用()。
A.敲击法装入 B.压力机压入 C.液压套合装配法 D.都不对 [简答题]在八佰拜一周年店庆同日推出的是
[多选题]4.5.
哪些属于变压器基建验收项目（ ）。 A.呼吸器顶盖下应留出1/5～1/6高度的空隙，在2/3位置处应有标示 B.主变油枕的油位与温度曲线相一致 C.现场多个温度计指示的温度与监控系统的温度应基本保持一致 D.气体继电器上加装防雨罩 我来回答: 提交
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