下列花卉种子，寿命最长的是（）.A.睡莲 B.荷花 C.王莲 D.千屈菜

若直线过点A（-2，-3），且横、纵截距互为相反数，则该直线方程为______．

He always did well at school________having to do part－time jobs every now and then. [ ]

A. in spite of  

B. regardless of

C. on account of  

D. in case of

The city dedicated a monument ________ those killed in battle.

A．with respect to　　

B．in line with

C．in answer to

D．in honour of

移动式供气源4个气瓶允许每次更换1个空瓶而不中断供气。

普通股股东具有表决权，优先股股东具有优先表决权。( )