江苏省启东中学2010-2011学年高二上学期期中考试英语试题.doc His mother could do nothing but _______ for the doctor to arrive. A. to wait B. waiting C. waited D. wait 答案:ckdaD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,引起盖子是鼓起的最可能原因是 ( )
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