小燕到医院检查完身体后,医生建议她多吃水果和蔬菜,请你判断医生让她主要补充的营养素是[ ]
A.蛋白质
B.糖类
C.维生素
D.油脂
答案:C
The Internet is a wonderful discovery, ___of great significance to people’s lives.
A.as is I think.
B.which think it is
C.which I think is
D.as I think
柴油机混合气形成时间极短。