12 To crack nuts with your teeth might break the ______, the hard outer covering on the teeth.
(A) mantle
(B) mettle
(C) enclave
(D) enamel

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統計: A(2), B(2), C(3), D(4), E(0) #2801280

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#5238905
To crack nuts with y...
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#5280657

用牙齒敲碎堅果可能會破壞琺琅質─牙齒上堅硬的外殼。

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