In many modern cars, most of the mechanical parts are and can only be dismantled by a qualified mechanic.
Asealed正確答案
Bnumbed
Cresigned
Dgulled
答案與詳解
A
正確答案
現代汽車多數機械零件被「密封」起來，只有合格技師能拆解。sealed 表密封、封閉。
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