As a ________ against computer viruses, I delete any e-mail whose sender is unknown. 
(A)distribution
(B)precaution
(C)reservation
(D)decoration

答案：登入後查看
統計： A(16), B(65), C(8), D(3), E(0) #403262

詳解 (共 3 筆)

#668200
（一）分销
（二）预防措施
（C）预订
（D）装饰
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0
#586065
作為預防措施，防範電腦病毒，刪除任何電子郵件的發件人是未知。
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#589310
precaution=預防;警惕;謹慎[U]
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0