-- Hello, may I speak to Mr Smith?
-- Sorry, he isn't in. He the office.
A:has been to
B:has gone to
C:has been away
D:has gone away
某物质在空气中燃烧时,有二氧化碳、水和二氧化硫生成。则此物质肯定含有的元素是( )
下列与如图有关的史实是( )
19世纪初年的流行语:开谈不说《红楼梦》,读尽诗书也枉然。这句话说明了( )
已知△ABC的周长为48cm,最长边与最短边之差为14cm,另一边与最短边之和为25cm,求△ABC各边的长.
解释下列词语
①毫无希望:
②灵感: