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Savery andNewcomen engines were similar EXCEPT:A.Both became relatively inexpen...

表示感谢。三、Dictation（本大题1小题．每题15.0分，共15.0分。Listen to the following passage. Altogeth...

，骨膜下脓肿，粘膜下脓肿C.根尖脓肿、根尖内芽肿、根尖囊肿 D.急性根尖炎，慢性根尖炎、慢性牙槽脓肿E.根尖脓肿、骨膜下脓肿、面部间隙感染96.根尖周...