| The world is not only hungry; it is
also thirsty for water. This may seem strange to you because nearly 75% of the
earth’s surface is covered with water. But about 97% of this huge amount is
seawater or salt water. Man can only drink and use the other 3%—the freshwater
that comes from rivers, lakes, underground, and other sources. And we cannot use
all of that, because some of it is in the form of iceberg and glaciers (冰河).
Even worse, some of it has been polluted. However, as things stand today, this small amount of fresh water, which is constantly being replaced by rainfall, is still enough for us. But our need for water is increasing rapidly almost day by day. Only if we take steps to deal with this problem now can we avoid a severe worldwide water shortage later on. A limited water supply would have a bad effect on agriculture and industr A. water and the earth B. fresh water on earth C. water shortage problem D. water and food shortage [单选题] 单洞三车道公路隧道消火栓间距不应大于（）米
A.30 B.40 C.50 D.60 [单选题]介绍 ( )的服务是美容师对待价位敏感的顾客的有效方法。
A.价格昂贵 B.价位适中 C.操作新颖 D.步骤繁杂 [多选题] 一张作业票时用于( )的施工作业。
A.不同地点 B.同一类型 C.依次进行 D.不同类型 [单选题]硬卧车代用硬座车时，硬卧每一下铺按（ ）人计算，不再加超员率，上铺均禁止出售，中铺吊起固定。
A.1 B.2 C.3 D.4 [单项选择]如下哪一项用于确定物料需求计划的可行性？（）
A. 资源需求计划 B. 粗能力计划 C. 能力需求计划 D. 工作中心能力控制 [单选题]在下列各项中，可能引起企业自有资金增加的筹资方式是()。
A.发行可转换债券 B.发行公司债券 C.利用商业信用 D.留存收益转增资本 [单选题] 在数字系统中，计数器是使用最多的时序电路，计数器可以用来对时钟脉冲计数，也可以用来定时、（ ）和执行数值运算等。
A.功率放大 B.信号调制 C.分频 D.A/D转换 我来回答: 提交
|
