在 xoy 平面内充满了均匀介质, t =0 时刻坐标原点 O 处的质点开始沿 y 轴做运动,其位移时 p 间关系式为 y =10sin( ) cm ,它在介质中形成的横波只向 x 轴正方向传播,某时刻波恰好传到 x =6m 处,波形图象如图所示,已知 M 点的平衡位置在 x= m 处,则下列说法正确的是
【简答题】Task 4 Zhang Li is introducing the Jade Buddha Temple to the tourists. Listen to the introduction and fill in the blanks with what you hear. The Jade Buddha Temple (玉佛寺) was first built in 1._________...