2021 年全国硕士研讨生入学共同考试英语（一）试题 section i use of english
directions:
read the following text. choose the best word (s) for each numbered blank and mark a, b, c or d
on the answer sheet. (10 points) fluid intelligence is the type of intelligence that has to do with short-term memory and the ability
to think quickly, logically, and abstractly in order to solve new problems. it 1 in young
adulthood, levels out for a period of time, and then 2 starts to slowly decline as we age. but
3 aging is inevitable, scientists are finding that certain changes in brain function may not be. one study found that muscle loss and the 4 of body fat around the abdomen are associated
with a decline in fluid intelligence. this suggests the 5 that lifestyle factors might help prevent
or 6 this type of decline. the rese