如图所示,将托里拆利实验装置中的玻璃管倾斜,则试管内水银柱的长度的变化情况是( )
A:不变
B:变长
C:变短
D:无法确定
Hurry up! The movie __________ for a quarter.
① ____ A. he B. her C. they D. it
② ____ A. write B. slept C. wash D. fly
③ ____ A. breakfast B. meal C. dinner D. lunch
下列物质在氧气中燃烧,产生大量白烟的是( )