阿摩線上測驗
6 National-security agencies invest hundreds of millions of dollars yearly in software to _______hackers and cybercriminals from invading our profiles.
(A) deter
(B) alter
(C) gather
(D) whisper
答案：登入後查看
統計： A(2), B(1), C(0), D(0), E(0) #3462045
統計： A(2), B(1), C(0), D(0), E(0) #3462045
