A:{2,5}
B:{1,3,5}
C:{2,4,5}
D:{2,4,6}
近几年,由于我市加大环境整治力度,植树造林,不断扩大绿化面积,周围的鸟类越来越多了,这种现象主要体现了( )
下图表示“制作洋葱鳞片叶表皮细胞临时装片”实验的部分操作步骤,步骤②和④滴加的液体分别是( )
将边长为1的正方形ABCD,沿对角线AC折起,使BD=62.则三棱锥D-ABC的体积为( )
Tom rode his motorbike to work yesterday and had a crash with a car. His motorbike was ________ and he was seriously ________.
新文化运动开始的标志是( )