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| 1. |
\left. \begin{array} { r } { = 9 \times 10 ^ { 9 } \times 0.2 \times 10 ^ { - 6 } \times 0.01 \times 10 ^ { - 6 } } \\ { \times [ \frac { 1 } { 0.05 } - \frac { 1 } { 0.10 } ] } \end{array} \right. |
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