12. Which factor may NOT recognize as the food contamination? (A) Bovine spongiform encephalopathy. (B) Environmental pollutants. (C) Colourants. (D) Pesticides.

10. What's the main purpose of this study? (A) to study the appearance of Chenopodium formosanum, (B) to investigate the antioxidant activity of fermented djulis (C) to investigate the influence of production cost on probiotcis, (D) to raise fund from foreigners.