提出“良好的教学应走在发展前面”的著名论断的科学家是（）。
A、皮亚杰
B、埃里克森
C、布鲁纳
D、维果斯基
参考答案：D
Which of the following makes the most appropriate title for the passage a. Cold-War Policies and the Tourism Industry b. The Characteristics of Political Tourism c. The Rise of Political Tourism d. The Latest Developments of Political Tourism
水文地质钻孔不必做好简易水文地质观测。
