A seed planted in the sensitive lining of an oyster begins a perpetual coatin...

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问题 A seed planted in the sensitive lining of an oyster begins a perpetual coating process that torms a peari.

选项 A:total
B:annual
C:continual
D:habitual

答案C

解析本句意思:当一粒种子被种植到了牡砺敏感的皮层之后,就开始持续不断的包裹过程直到形成珍珠。perpetual意思是“连续不断的”,与continual(持续不断的,频繁的)意思相近。total全部的,完全的;annual年度的,每年的;habitual习惯的,惯常的。
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