17. 堆石坝钢筋混凝土面板宽块纵缝间距一般为 (  )。

、<span>12</span><span>～</span><span>16 m</span>

、<span>6</span><span>～</span><span>7 m</span>

、<span>8</span><span>～</span><span>11 m</span>