偏角法是用（）测设园曲线细部点
A.转折角
B.弧线
C.切线
D.偏角
E.弦线
参考答案：D, E
一个长方形运动场的面积是960平方米，这个运动场的宽是24米，长是多少米？（列方程解）
What does your father often do _____ his spare time?[ ]
A. for
B. with
C. in
D. about
his spare time?[ ]