高于天然地面的（）路基称为路堤。
A、填方
B、挖方
参考答案：A
How's the weather in December?[ ]
A. It's cold and rainy in December.
B. It's cold and snowy in December.
中国城市化水平比世界平均水平低？（）
A.3%
B.8.4%
C.10%
D.15%
