关于如图所示的实验装置,下列说法正确的是( )
已知函数fx=lnxx≠00x=0,则方程f2x-fx=0的不相等的实根个数为( )
—The weather turns out to be fine.
— We can depend on ___ that the goods will be shipped to the flooded area on time.
观察下列图案,既是轴对称图形又是中心对称图形的有( )