阿摩線上測驗
53.What is a seismic air gun used for?
(A) To predict the coming of an earthquake.
(B) To investigate ocean creatures in US Eastern Seaboard.
(C) To keep the marine life out of the oil rig.
(D) To search for oil and gas under the ocean floor.
答案：登入後查看
統計： A(3), B(9), C(8), D(93), E(0) #2008213
統計： A(3), B(9), C(8), D(93), E(0) #2008213
