根据外商投资企业的有关法律规定，下列关于中外合资经营企业与中外合作经营企业区别的正确

鉴别膀胱 * * 瘘、膀胱宫颈瘘最主要的检查方法是

A．B超

B．肾造影

C．膀胱镜

D．亚甲蓝试验

E．靛胭脂试验

如图是元朝最著名画家赵孟颊的代表作《秋郊饮马图》。

重阴必阳，重阳必阴说明了阴阳之间的哪种关系 （）

A.相互交感

B.对立制约

C.互根互用

D.消长平衡

E.相互转化

用单词的适当形式填空。

1.  Class One beat Class Two in the football match. The students are very_______  (excite). 

     However, their teacher is ______ (excite) of them.

2.  Mrs. Zhang is telling an________ (excite)  story to us.

3.  Look! The children _______ (swim) at the pool.

4.  My father likes _______ (swim) in summer.

5.  He ______(swim) faster than his father.

6.  We ______(swim) in the swimming pool yesterday.

为什么励磁机整流子表面形成的氧化膜不能用砂纸研磨？