【单选题】As shown in the figure, the temperature increases t1 above the beam and decreases t2 below the beam, and t1 < t2.The displacement of points C and D are:【图片】
【单选题】If a cup of coffee has temperature 95 celsius in a room where the temperature is 20 celsius, Conan found that the temperature of coffee after t minutes can be simulated by the following function What...