则Y=（）。
A.A
B.B
C.C
D.D
参考答案：B
The old man came ___ to the railway station, only ___ the train was slowly pulling out of the station.
A．and ran; found
B．running; finding
C．running; to find
D．to run; finding
属于植物化学物的是
A．多酚类
则Y=（）。
则Y=（）。