.无缝线路路基翻浆下沉，以及其他影响线路稳定的病害应（）。
参考答案：及时整治
—Did you play cards yesterday?
—________[ ]
A. Yes, I play cards with my friends.
B. Yes, I played cards with my friends.
C. Yes, I am playing cards with my friends.
“罗盘纹”是形容哪种药材断面的特征？（）
A.怀牛膝
B.大黄
C.何首乌
D.商陆
