大数据时代的()，将是所有大数据应用的前提条件。

不定项选择在光能自养型生物中，凡属原核生物者必不产氧。

单项选择题'There is nothing to stop it.' means ______.A.the wind always blows strongly without stoppingB.there is nothing in its way to break the force of the windC.there is nothing anyone can do to stop the wind blowingD.the cars do not find it easy to stop on the open road