【简答题】A.The helicopter can fly forwards, backwards, up, down, and sideways. B.The helicopter can hover in the air. C.The helicopter can land and take off from a flat roof. D.The helicopter has a single-blad...
【单选题】听力原文:(A) The helicopter is on the ground. (B) There is a column-like tower in the picture. (C) The plane wants to rescue the man on the tower. (D) The helicopter has some engine problems.