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某段路基，按照设计文件提供的取土场的填料为山皮土，承包商进入现场后发现，在路基附近的河中有大量符合路基填筑的砂砾，且具开采容易、运距较指定土场近，价格也较山皮土便宜，故在征得监理工程师的同意后，即用此砂砾进行本段路基的填筑；但在路基填筑完成后，承包商以使用砂砾填筑的路基其强度较山皮土填筑的路基强度高为由，提出了变更申请，要求以合同的工程量清单中的砂砾垫层的单价(高于山皮土)来支付。
试问：(1)监理工程师可否批准此变更，理由如何？(2)应以哪个单价支付？

在Word编辑状态下,当鼠标指针指向选项定文本任何位置时,按住Ctrl键的同时，拖动鼠标到目标位置，可以实现文本的移动。()

教师专业化的概念早在20世纪60年代就已被提出。___年，联合国教科文组织和国际劳工组织在_中就强调教师的专业性质，认为应该把教师工作视为_____。

Can money buy happiness？ Yes, exclaim the authors of a new 【M1】
study—but only up to a point.
Psychology has shown that rich people generally rank the
overall quality of their lives more favourable than poor people do. At 【M2】
the same time, their actual happy seems to be motivated less by their 【M3】
ability to buy more than by being able to keep up with those with
comparable resources in their own age group.
"Our findings point to the possibility that, rather than
promoting overall happiness, continued income growing could 【M4】
promote an ongoing consumption race where individuals have to
consume more and more, just to maintain a constant level of
happiness," writes Glenn Firebaugh of Pennsylvania State
University.
The study was presented at the American Sociological
Association's 100th Annual Meeting.
What the rich are happier as a whole than their less well-to-do 【M5】
counterparts is becoming an increasingly hot topic for debate. In
recent years, many has been written regarding the "science of 【M6】
happiness".
Richer people are happier because money can purchase goods
and services and it is the consumption of these materials increases 【M7】
one's enjoyment of life and one' s sense of well-being.
As incomes in the U.S. tend to be rise over the course of our 【M8】
lifetimes, individuals may find themselves on a sort of treadmill,
consuming more and more just to maintain a constant level of
happiness, they write.
Firebaugh and his colleagues measured the age, total family
income, and general happiness of individuals aged 20 to 64,
generally considered the working life span for most Americans.
Regardless of such criteria as physical health, education, and
marital status, people's happiness was effected by what others 【M9】
earned. The higher is the income of others in one's age group, the 【M10】
lower one's happiness.
【M1】