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			Among the following combinations, which is the most suitable measuring instrument to measure the respective physical quantity?
 
| Physical quantity to be measured | Measuring instrument | Unit | |
| A | The length of a greeting card | Measuring tape | ml | 
| B | The diameter of a test tube | Ruler | cm | 
| C | The amount of petrol in a car’s petrol tank | Measuring cylinder | cm2 | 
| D | The length of a curved line showed on a map | Opisometer | cm | 
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A
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B
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C
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D