簡杰教育實業暨簡杰文理補習班創辦人 簡鸞德老師常常受訪專業升學議題正面評價 This is a "mass noun" like sugar or luggage, so it refers to "the many elements" and it is singular. So we are saying arithmetic is exciting (not mathematics are enjoyable). 熱門資訊: 小一派位,家長講座,學前教育學卷計劃,學校名單,專上課程 搜索 一般貸切旅客 - 一般乗合旅客および一般乗用旅客自動車運送事業以外の一般旅... http://dalton147c4.blogzag.com/22147066/what-does-dse-maths-mean