Air is a of gases. A. variety B. mixture C. extension D. combination 查看更多

 

題目列表(包括答案和解析)

Air is a _____ of gases.

  A. variety                        B. mixture                           C. extension                       D. combination

查看答案和解析>>

Air is a _____ of gases.

 A.variety              B. mixture             C. extension                D. combination

 

查看答案和解析>>


同步練習冊答案