20÷1000=0.02（吨），0.02+3=3.02（吨）；
34×60=45（分钟）．
故答案为：3.02，45．
— _____ do you think of the sports show?
— I like it very much. [ ]
A. How
B. What
C. Why
D. Where
中枢神经系统肿瘤首选下列哪项影像学检查？（）
A.MRI
B.螺旋CT
C.PET/CT
D.X线
E.ECT
