高填方路堤应采用分层填筑、分层压实的方法施工,每层填筑( )根据所采用的填料决定。
A. 湿度
B. 密度
C. 宽度
D. 厚度
滑坡滑带的形状在匀质土中多近似于( )。
A. 圆弧形
B. 折线形
C. 长方形
D. 倒锥形
I' m grateful because you have taken ______ to show me how to do the work.
A. efforts
B. pains
C. attempts
D. endeavors
In the first sentence of Paragraph 4, "Wasichus" probably refers to ______.
A. the Indian's enemies
B. the white men
C. the Great Spirit
D. the Power of the World