【单选题】亚洲比欧洲大3倍。
A.
Asia is four times as large as Europe.
B.
Asia is three times larger than Europe.
C.
Asia is three times the size of Europe.
【单选题】超声(声)在介质中的传播速度(声速)由小到大依次是( )
【多选题】设集合【图片】上的二元关系【图片】【图片】则S是R的()闭包.
【单选题】设S={1,2,3},S上关系R的关系图为【图片】则R具有( )性质
【多选题】超声在介质中的传播速度(声速)由小到大依次是:
【单选题】设S={1,2,3},S上关系R的关系图【图片】为则R具有( )性质
【单选题】超声 在介质中的传播速度 ( 声速 ) 由 大 到 小 依次是 ( )
【单选题】亚洲比欧洲大3倍。
A.
Asia is four times as large as Europe.
B.
Asia is three times larger than Europe.
C.
Asia is three times the size of Europe.
D.
Asia is three times as large as the size of Europe.
【单选题】设S={1,2,3},S上关系R的关系图为【图片】则R具有的性质包括
【单选题】超声在介质中的传播速度(声速)由小到大依次是