_________ your bicycle.
A:Close
B:Open
C:Clean
将一定溶质的质量分数的NaCl溶液,逐渐加水稀释,随着水的加入溶液中下列变化正确的是( )
在△ABC中,若sinAsinB=cos2C2,则△ABC是( )
He was late as a result of the heavy snow.
下列有关ATP的叙述,正确的是( )