—Ten minutes' ride. But it _____ me half an hour to walk there yesterday.
A:far, took
B:long, takes
C:often, took
植物固定二氧化碳的场所是
如图为花的雌蕊结构模式图,受精后发育成种子的是( )
示例:硫在氧气中燃烧: S+O2→点燃SO2