數學問題
Sennheiser PX 210 BT - Wireless Bluetooth Headphones - Superb ...在一堂數學課上,老師問同學們:「誰能出一道關於時間的問題?」 話音剛落,有一個學生舉手站起來問:「老師,什麼時候放學?」PX 210 BT - Wireless Bluetooth Headphones - Superb Stereo Sound - Foldable, Lightweight, Steel-reinforced headband - Ideal for all mobile audio sources ......
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