I have____(只,仅仅)one ruler.
—Can a plane fly__________ the Atlantic Ocean?
—Yes, but it needs to go_______ the clouds for hours.
回答下列问题:
绿色植物以____和水为原料,通过____作用制造的有机物,不仅用以满足植物本身的生长需要,同时还是动物和人所需____的最终来源.