A:I go to school by bike.
B:I go to the library by bike.
某兴趣小组为验证质量守恒定律,做了镁条在空气中燃烧的实验.
(2015•遵义)下列各项排列中,按尺度的数量级由小到大排列的是( )
People say it is Canada's most beautiful city, ____(包围)by mountains and the Pacific Ocean.