问题
选择题
Bill was doing a lot of physical exercise to build up his________. [ ]
A. ability
B. force
C. strength
D. mind
答案
答案：C
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Bill was doing a lot of physical exercise to build up his________. [ ]
A. ability
B. force
C. strength
D. mind
答案：C
，5月底的示数为
，则小华家5月份消耗的电能为 kW·h，应付电费 元（按每度电均价0.5元计算）。