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【单选题】
任何一项工程从决策到竣工交付使用都有一个较长的建设期间。在这期间内，有很多因素如工程变更、设备材料价格、工资标准以及费率、利率、汇率等都会发生变化，而这些变化必然会影响到造价的变动，从而使工程造价呈现( )。A.
差异性
B.
动态性
C.
层次性
D.
大额性
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A.
who
B.
which
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D.
whose
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A.
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B.
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A.
he doesn't know it is a fine day
B.
he doesn't think it is a fine day
C.
he thinks it is a fine day
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A.
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B.
Your leader's inspection.
C.
Something unpleasant to be experienced.
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