题目

It was for this reason ________ her uncle moved out of New York and settled down in a small village. A．which             B．why            C．that           D．how   答案：C强调句型，强调介词短语。图中所示为一简谐横波在某一时刻的波形图，已知此时质点A正向上运动，如图中箭头所示，由此可断定此横波（   ）A．向右传播，且此时质点B正向上运动B．向右传播，且此时质点C正向下运动C．向左传播，且此时质点D正向上运动D．向左传播，且此时质点E正向下运动