At the end of the meeting, it was announced that an agreement ______.
A:has reached
B:had reached
C:has been reached
D:had been reached
“如今有个趋势,人们怀念她的民主制度,并将其视为所有现代民主制度的源头。”“她”指的是( )
一块底和高分别为88米和43米的平行四边形的土地,如果平均每平方米可种植小树苗3棵,那么共可种植____棵小树苗.
如图所示,直线A为电源的U—I图线,直线B为电阻R的U—I图线,用该电源和电阻组成闭合电路时,电源的输出功率和电路的总功率分别是( )
读《热爱生命》,狼的“样子可笑极了”,为什么“他一点也不觉得有趣”?