D My PhD supervisor used to jokingly tell me that he had passed his prime( 鼎盛时期 ) and that it was up to me to make the Nobel Prize winning discovery for our group. After all, Albert Einstein was just 26 years old when he wrote his paper on Special Relativity. But are we really at our smartest in our 20s? When does our intelligence peak? It’s an unavoidable fact that our cognitive (认知) abilities are destined to decline at some point. We will have a harder time remembering where we placed our keys or recalling the details of our favorite family story. However, our intelligence is multi-faceted. We have fluid intelligence—that’s our ability to think creatively, solve new problems, and identify patterns, independent of any knowledge from the past. We also have what psychologists call crystallized intelligence, which reflects our learned knowledge and ability to relate to our surroundings. This improves somewhat with age, as experiences tend to expand one’s knowledge. These two forms of intelligence are thought to peak at different times in our lives. Recently, researchers at Harvard and MIT carried out a study. The results of the study showed that we don’t have to put ourselves out to pasture just yet. For example, 50,000 test participants showed that our ability to process information quickly peaks at around age 18 or 19. Our short-term memory tops out around the age of 25. Likewise, our skill at recognizing faces is greatest when we are in our early 30s. The peak age for creativity in physics appears to be around 48 years old on average. Our overall knowledge, including vocabulary, don’t stop out until we are around 50 years old on average. 32.What do we learn about the writer? A. He used to be a PhD supervisor B. He probably got a doctor degree. C. He has made great breakthroughs. D. He has a good knowledge of physics. 33.Fluid intelligence includes the following EXCEPT_______. A. creative thinking. B. pattern recognition. C. problem-solving. D. knowledge accumulation. 34.Crytallized intelligence probably peaks when a person is ______. A. weaker B. younger C. stronger D. older 35.What’s the right order of the behavior of our intelligence peak according to the study ? A. recognize faces→ process information→short-term memory→ creativity in physics→overall knowledge. B. recognize faces→ process information→ creativity in physics→ short-term memory→overall knowledge. C.process information→short-term memory→recognize faces→ creativity in physics→overall knowledge. D. process information →short-term memory →creativity in physics→ recognize faces →overall knowledge .