05 mA=______A=______μA
A. 50/5′10-5
B. 5′10-5 /5
C. 5′10-3/50
D. 5′10-5/50
05mA= μA= A
A. 5/5×10-5
B. 5×102/5×10-3
C. 50/5×10-5
D. 5×103/5×10-5
— Will Peter come with us tonight — He ____ come ,but he isn’t very sure yet.
A. must
B. can
C. may
D. will
梨适宜在()温度下贮藏
A. 0-1℃
B. 10-15℃
C. 20-25℃
D. 25-30℃