_____ the youth to the rising sun at 8 or 9 a. m. Mao Zedong expressed his great hope for the young men.[ ]

A．Compared  

B．To compare

C．Comparing  

D．Compare

拆结构复杂的桥梁或拆除过程复杂、困难时，应采取（）手段，确保施工安全。

A.仪器监测

B.计算分析

C.实时控制

D.局部临时加固