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简述水玻璃砂的特点？

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据《灵枢·水胀》篇所述，肠蕈是因寒邪居于（）

A. 子门
B. 肠内
C. 肠外
D. 子宫门
E. 胸腔

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在解几何证明题时，学生常从问题的目标状态往回走，先确定达到该目标所需要的条件，然后再将达到目标所需要的条件与问题提供的已知条件进行对比，完成证明过程。这种方法属于问题解决中的（）。

A. 反推法
B. 算法式
C. 简化法
D. 类比法

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简述佛教对中国文化的影响。

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Acme Nutrition manufactures a wide variety of vitamin supplements. It has a single manufacturing facility with 3 regional warehouses and 16 district sales offices. Currently the manufacturing facility requires 210 IP addresses; each warehouse requires 51 IP addresses; each district sales office requires 11 IP addresses; and the IP WAN requires 38 IP addresses. if Acme Nutrition plans for 20 percent growth in facilities, how many Class C subnets will the district sales offices require?（）

A. 19 (3 from the warehouse range and 16 from a separate Class C address)
B. 19 (3 from the warehouse block, 15 from a separate Class C block and 1 from the IP WAN block)
C. 20 (4 from the warehouse range,15 from a separate Class C block and 1 from the IP WAN block)
D. 16 (3 from the warehouse range and 13 from a separate Class C address)

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