The eardrum, a taut membrane, located at the end of the ear canal, separates the outer ear from the inner ear.

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问题 The eardrum, a taut membrane, located at the end of the ear canal, separates the outer ear from the inner ear.

选项 A、lightly tinted
B、somewhat opaque
C、tightly stretched
D、delicately made

答案C

解析
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