—Why not take ____ umbrella with the sign “Made in China”? It's ____ useful one.—What ____ good advice.
A:an; an; a
B:an; a; \
C:a; an; a
D:\; an; a
If you want to learn English well, you should learn enough words by heart and do enough reading.
我市某县多雨季节易发生滑坡、崩塌等灾害,建有市级地质灾害防治点11处。读图1、图2,回答下题。
472是5的( )