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关于“该图表明导电率呈下降趋势。”一句的两种英文表达： ①The graph indicates there is a downward trend of the conductivity. ②The graph indicates a downward trend of the conductivity. 以下说法正确的是________。
A．①正确，②错误
B．①错误，②正确
C．①正确，②更好
D．①错误，②错误
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