Which one is NOT connected with others? A: Reservior B: Brake pipe C: Brake cylinder D: Compressor

n.价格，价钱；代价 A: reservior / / B: orchestra / ‘ɔ:kistrə/ C: price / prais/ D: beach / bi:tʃ/

What did this study accomplish A: The study allows doctors to control the part of HIV that’s active in the body quite well. B: The hidden pool of HIV is named as the reservior through this study. C: The hidden pool of HIV is lowered modestly in the four patients. D: The hidden pool of HIV could be reduced more than 80 percent.