异硫氰酸荧光素的英文缩写是
B
暂无解析
Wearemakingamodelplane.(变成一般疑问句)
______________________________________
()_____youseetheblackboard?
Theofficebuilding_____theclassrooms
country_________(复数)
两人进行踢毽子比赛，用抛硬币的方法来决定谁先踢是公平的。()