既不改变项目风险的客观性质，即不改变项目风险的发生概率，也不改变项目风险潜在损失的严重性的建设工程项目风险应对策略是（）。
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Which of the following is NOT MENTIONED in the third paragraph？
A. Group work gives pupils the opportunity to learn to work together with other.
B. Pupils also learn to develop their reasoning abilities.
C. Group work provides pupils with the opportunity to learn to be capable organizers.
D. Pupils also learn how to participate in teaching activities.
By “held back” (Line 1) the author means “________”
A. made to remain in the same classes
B. forced to study I the lower classes
C. drawn to their studies
D. prevented from advancing
纳税人因有特殊困难，不能按期缴纳税款的，经省、自治区、直辖市国家税务局、地方税务局批准，可以延期缴纳税款，但是最长不得超过（）个月。
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