He was ____   by his colleague thoughhe himself didn't think he had done anything special.    [ ]

A. thought little of          

B. thought poorly

C. thought highly of        

D. thought high of

建筑设备施工图主要通过图线.（）并配合文字描绘工程的具体内容。

A.数字

B.符号

C.字母

D.编码工程的具体内容。