阿摩線上測驗
52. A parachute needs to be opened because it can
(A) slow down the shuttle.
(B) stop the shuttle from falling.
(C) make the shuttle get closer to Earth.
(D) help the shuttle glide through the atmosphere.
答案：登入後查看
統計： A(17), B(6), C(4), D(8), E(0) #629321
統計： A(17), B(6), C(4), D(8), E(0) #629321
