—Did you know China is one of the oldest countries in the world?
—Yes, I did. It’s ______ than the US.
A:much older
B:more older
C:much elder
D:more elder
下面的计算正确的是( )
已知命题p:在△ABC中,“C>B”是“sinC>sinB”的充分不必要条件;命题q:“a>b”是“ac2>bc2”的充分不必要条件,则下列选项中正确的是( )