I haven′ t seen Sara since she was a little girl, and she has changed beyond .

对于压实填土地基，下列( )材料不适宜作为压实填土的填料。A.砂土B.碎石土C.膨胀土D.粉质粘土

单项选择题对于压实填土地基，下列( )材料不适宜作为压实填土的填料。

Where in the past three years?A.hadyougoneB.haveyougone...

单项选择题Where in the past three years?

随车机械师在处理动车组故障需要救援时只须做好防护就可以。( )

判断题随车机械师在处理动车组故障需要救援时只须做好防护就可以。( )