一个质量为0.5kg的铁球，用绳悬挂起来并使其摆动（如图）．用力的图示法画出铁球所受的重力．（g=10N/kg）
---Of the two houses we saw today, which do you prefer?
---I think ____ white one is prettier, but ____ brick one has ___ bigger yard, so I like it better.
A．a, the, a
B．the, the, a
C．the, a, the
D．the, the, 不填
肾脏的弓状动脉位于（）
A.肾柱内
B.肾皮质内
C.肾柱与锥体之间
D.肾髓质与肾皮质交界处
E.肾髓质内
