为什么要定期对海管进行清理?
Which timing mode is most appropriate for an ONS 15454 that has lost its BITS-1 and optical references?() [" line timing"," loop timing"," internal timing"," through timing"," external timing"]
俗话说:“分久必合,合久必分。”我国历史上出现过多次分裂局面,也有不少历史人物重新建立大一统的王朝。下面几位政治家中,在这方面作出了重大贡献的是()。 ①嬴政 ②杨坚 ③赵匡胤 ④忽必烈 ["①②③","②③④","①②④","①②③④"]
老舍对市民社会的表现与批判,呈现出哪两种不同的态度?
均匀成核
高级语言源程序的翻译有两种方式,一种是(),另一种是()。