单选题
1分
Einstein's Theory of Relativity was so pofound that only a few scientists could understand it.
参考答案: A
参考解析: 本句意思:爱因斯坦的相对论是如此的深奥,以至于只有少数科学家能够理解它。profound意为“深刻的,深奥的”,与deep(难懂的,深奥的)意思相近。superior较高的,较好的;wide宽的;narrow窄的。