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单项选择题
下面颜色中，属于偏暖的冷色的是
A、粉红
B、青
C、草绿
D、紫
B、青
C、草绿
D、紫
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问答题
供长输的天然气，其脱水深度以确保在输送过程中水蒸气不致凝析和形成水合物为原则，所以天然气的露点应比管道输气的最低温度低5～10℃。The dewatering depth of natural gas for long-distance transportation is to ensure that water vapor does not condense and form hydrate during transportation. Therefore, the dew point of natural gas should be 5 ~ 10℃ lower than the minimum temperature of pipeline gas transmission.
供长输的天然气，其脱水深度以确保在输送过程中水蒸气不致凝析和形成水合物为原则，所以天然气的露点应比管道输气的最低温度低5～10℃。The dewatering depth of natural gas for long-distance transportation is to ensure that water vapor does not condense and form hydrate during transportation. Therefore, the dew point of natural gas should be 5 ~ 10℃ lower than the minimum temperature of pipeline gas transmission.
答案：
在长输天然气管道中，确保天然气在输送过程中不发生水合物的形成和水蒸气的凝析是非常重要的。水合物的形成会增加管道的流动阻力...
