This new copy machine is more___than the old one,which improves the___of work
| A．effective;efficiency |
| B．effective;effect |
| C．efficient;efficiency |
| D．efficient;effect |
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This new copy machine is more___than the old one,which improves the___of work
| A．effective;efficiency |
| B．effective;effect |
| C．efficient;efficiency |
| D．efficient;effect |
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