补写出下列名句名篇和文学常识的空缺部分。(6分)
(1)山围故国周遭在,潮打空城寂寞回。,夜深还过女墙来。
下列关于简谐振动和简谐波的说法,正确的是
A.媒质中质点振动的周期一定和相应的波的周期相等
B.媒质中质点振动的速度一定和相应的波的波速相等
C.波的传播方向一定和媒质中质点振动的方向一致
D.横波的波峰与波谷在振动方向上的距离一定是质点振幅的两倍。
What do we know about the girl? ( )
A.She is new to the school.
B.She writes for the school newspaper.
C.She seldom asks questions in class.
下列关于有机物的说法错误的是
A.CCl4可由CH4制得,可萃取碘水中的碘
B.石油和天然气的主要成分都是碳氢化合物
C.乙醇、乙酸和乙酸乙酯能用饱和Na2CO3溶液鉴别
D.苯不能使KMnO4溶液褪色,因此苯不能发生氧化反应
At what time of the school term does the conversation most probably take place? ( )
A.At the end of it.
B.In the middle of it.
C.At the beginning of it.