题文
Many manufacturers were accused of concentrating too heavily on cost reduction, often at the ______ of the quality of their products.
| A．expense | B．exposure |
| C．expansion | D．expectation |
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Many manufacturers were accused of concentrating too heavily on cost reduction, often at the ______ of the quality of their products.
| A．expense | B．exposure |
| C．expansion | D．expectation |
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