Directions: Read the following paragragh carefully. Cross o

Directions: Read the following paragragh carefully. Cross out two sentences tha

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(2008建筑实务II-20)饮用热水管要求采用无毒、无害、不生锈有高度的耐酸性和耐氯化物性;耐热性能好;适合采用热熔连

(2008建筑实务II-20)饮用热水管要求采用无毒、无害、不生锈有高度的耐酸性和耐氯化物性;耐热性能好;适合采用热熔连接方式的管道,则饮用热水管道应选用(

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