If you heat water to 100 degrees,, it boils., If you go out in the sun,, your body produces vitamin D., If a plane flies faster than sound,, there is a loud noise., If astronauts spend time in the Skylab,, they get taller., If there is no oxygen, , things can't burn., If you multiply any number by zero,, the answer iz zero..

0 conditional

由
列印
嵌入

排行榜

視覺風格

選項

切換範本

)
恢復自動保存: ?