It is important to have your eyes examined regularly to check for any sign of eye disease that may not

have any ________. [ ]

A. symptom    

B. similarity      

C. sample      

D. shadow

综合教学要求在教学和游戏活动的过程中，各个领域的内容要()。

A、互相联系，互相渗透 

B、互不关联 

C、针对所有年龄层的婴儿进行教学 

D、有很强的针对性