試題選項拼字練習 (100年指考第6題)
100年指考第6題
請按滑鼠或字鍵選出正確或最適當的答案:
Each of the planets in the solar system circles around the sun in its own _____, and this prevents them from colliding with each other.
參考詞彙 附 錄第一級第二級第三級第四級第五級第六級