柔索所受的载荷如是沿索长均匀分布的，则按（）法计算分析，如是沿弦长均匀分布的，则按（）法计算分析。
参考答案：悬链线；抛物线
方程x4-3x2-4=0 的根是（ ）。
A party was held _____ the heroes who had helped saved thousands and thousands of lives in the big earthquake in Sichuan. [ ]
A. in time of
B. in honor of
C. in name of
D. in place of
