根据句意及汉语提示,完成句子。(1)Unfortunately, my car ____ down when I went home.(抛锚)(2)He looked at me in ____ . (惊讶)(3)____ (安全) is important.(4)Have you ____ of the romantic tale? (听说)(5)In his ____ (三十),he began to teach.
如图是缩手反射反射弧的模式图,若③处损伤,则导致( )
若A、B、C是直线l上的三点,P是直线l外一点,且PA=6cm,PB=5cm,PC=4cm,则点P到直线l的距离( )
下列关于黄河的诗句书写有误的一项是( )