题目

买罐头食品时，发现罐头盖上印有“如发现盖子鼓起，请勿选购”的字样。引起盖子鼓起最可能的原因是 A．好氧型细菌呼吸，产生CO2和H2O               B．微生物呼吸，产生CO2和C2H5OH C．乳酸菌呼吸，产生CO2和C3H6O3                D．酵母菌呼吸，产生CO2和H2O 答案：B(   ) 2. —Are you going to the school concert tonight?—Of course. I will       a dance. Youknow, I am good at dancing.A. express    B. watchC. perform    D. process