the army,navy and air force这里的force为什么不用复数?这不是三军吗？三不是复数吗？

A language is a dialect with an army and navy the army,navy and air force这里的force为什么不用复数?这不是三军吗？三不是复数吗？ 英语翻译 Make sure the belt and cuff are navy 5. Either the Army or the Navy _____ it, it should be done soon. A. do B. will do C. to do D. does什么意思，为什么》 求一篇6级英语作文some people think woman should be allowed to join the army.the navy and the air force just like wam.to what extant do you agree or disagree?字数在150到200之间能给个提纲也行吧 折中式那种，开头应该怎样 曾见过一件衣服上些army navy,US NAVY这是什么牌子的?能不能详细点？ russian navy officers and soldiers onboard the cruiser watched the sinking boat and did not make an Ai you are the one and force navy army都是指部队,在用法上有什么不同? 英语翻译The Army combined elements from the former United States Army Soldier and Biological Chemical Command and the former Program Manager for Chemical Demilitarization to consolidate the Army's chemical agent and munitions storage and demilita Secretary of the Army 英语翻译russian navy officers and soldiers onboard the cruiser watched the sinking boat and did not make any response to the cries for help from the crewmen russian navy officers and soldiers onboard the cruiser watched the sinking boat and did not make any response to the cries for help from the crewmen do you still remember the day ____you joined the Army and _____we spent together?请填空 英语翻译commodore matthew rerry and his famous black ships entered the harbor in naha in the year 1853.brighten your stay on okinawa 1983-department of the navy 英语翻译commodore matthew rerry and his famous black ships entered the harbor in naha in the year 1853.brighten your stay on okinawa 1983-department of the navy My elder brother will join the Army and _____（成为） a soldier next month. He worked as a doctor in the army and saved many s___ lives按首字母填空