阿摩線上測驗
8. Palm-sized unmanned aircrafts, flying robots, can ________ dangerous rescues when rescuing tasks are too risky for human beings
to carry out.
(A) execute
(B) alleviate
(C) impact
(D) utilize
答案：登入後查看
統計： A(97), B(32), C(13), D(21), E(0) #2951690
統計： A(97), B(32), C(13), D(21), E(0) #2951690
