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( )系统实施的最后一步是新系统的试运行和新旧系统的转换，它是系统调试和检测工作的延续。
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母子公司之间存在控制与依附关系，其中母公司具有独立的法人资格，而子公司是可以领取营业执照、进行经营活动的非法人企业。( )
Look at your watch for just one minute. During that time, 174 babies were born in the world. Maybe you think that isn’t many. During the next hour, over 10440 more babies will be born in the world. So it goes on, hour after hour. In one day, people have to find food for over 250 000 mouths more. Just think how many more there will be in one year! What will happen in one hundred years The population (人口) problem may be the greatest one of the world today. The world’s population is growing faster and faster. Two thousand (千) years ago, there were only 200 million (百万) people in the world. Four hundred years ago, the number was over 500 mil- lion. But in the year 1900, the world’s population was about 1700 million. In 1970, this number was over 3 600 million. In 1990, the number was over 5 billion (十亿). People say by the year 2010, it may be seven billion. That means in about 600 years, there will be only standing room on the earth. One hundred years ago, there were also 174 babies being born in every minute.
在向数据表中输入数据时，若要求输入的字符必须是字母，则应该设置的输入掩码是______。
施工单位对施工过程中发生的以下事件可否索赔为什么2．计算工程师2006年第4季度应确定的工程结算款额。3．如果在工程保修期间发生了由施工单位原因引起的屋顶漏水，墙面剥落等问题，业主在多次催促施工单位修理而施工单位一再拖延的情况下，另请其他施工单位维修，所发生的维修费用该如何处理
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