A 分析:顯微鏡放大倍數(shù)等于物鏡放大倍數(shù)與目鏡放大倍數(shù)的乘積.所以目鏡的放大倍數(shù)就應(yīng)是顯微鏡放大倍數(shù)除以物鏡的放大倍數(shù). 解答:通過分析已知要放大的倍數(shù)是600倍,物鏡放大倍數(shù)是40倍,而目鏡的放大倍數(shù)就應(yīng)是顯微鏡放大倍數(shù)除以物鏡的放大倍數(shù),即600÷40═15(倍). 故選A. 點評:只要牢記顯微鏡放大倍數(shù)等于物鏡放大倍數(shù)與目鏡放大倍數(shù)的乘積,這類題目就會迎刃而解.