如图所示为匀强电场中的一组等势面.已知相邻两个等势面间的距离为0.1 m，则匀强

Linda can't attend the party________ at Tom's house at present because she is preparing a speech for the party ________ at Marie's house tomorrow.

A．being held; to be held

B．to be held; held

C．held; being held

D．to be held; to be held

China wants _____ greater say in the decision-making of the International

Monetary Fund, and tougher regulations on _____ financial system in wealthy countries to prevent future problems.   

A．a; the

B．the; 不填

C．the; the

D．a; 不填

既清实热，又清虚热的药物是（）

A.胡黄连

B.知母、黄柏

C.地骨皮、青蒿

D.赤芍

E.牡丹皮、生地

胎儿和母体之间进行物质交换必须通过的器官是[ ]

A．卵巢

B．胎盘

C．子宫

D．输卵管

对《愚公移山》这篇寓言故事的思想意义应怎样认识？

__________________________________________________________