Any brain exercise is better than being a total mental couch potato. But the activities with the most (1) are those that require you to work beyond what is easy and comfortable. Playing (2) rounds of games and watching the latest documentary marathon on the History Channel may not be enough. Just as your muscles grow stronger with use, mental exercise keeps your mental skills and memory in tone. But what kind of exercise is best for the brain ？ Here are some suggestions.
Be a lifelong learner. Continuing to learn new things can build and (3) the connections between brain cells.
(4) your brain. Think of all mental activities as a continuous whole. Watching a TV documentary would be on the passive, mildly challenging end of the (5) , while learning how to converse in a new language would be on the active, very challenging end. When it comes to cognitive reserve, (6) challenging tasks have the biggest impact.
A. endless
B. isolation
C. maintain
D. spectrum
E. evidently
F. navigate
G. timid
H. frantic
I. mentally
J. diverse
K. impact
L. deprive
M. alternative
N. excursion
Any brain exercise is better than being a total mental couch potato. But the activities with the most (1) are those that require you to work beyond what is easy and comfortable. Playing (2) rounds of games and watching the latest documentary marathon on the History Channel may not be enough. Just as your muscles grow stronger with use, mental exercise keeps your mental skills and memory in tone. But what kind of exercise is best for the brain ？ Here are some suggestions.
Be a lifelong learner. Continuing to learn new things can build and (3) the connections between brain cells.
(4) your brain. Think of all mental activities as a continuous whole. Watching a TV documentary would be on the passive, mildly challenging end of the (5) , while learning how to converse in a new language would be on the active, very challenging end. When it comes to cognitive reserve, (6)
A. endless
B. isolation
C. maintain
D. spectrum
E. evidently
F. navigate
G. timid
H. frantic
I. mentally
J. diverse
K. impact
L. deprive
M. alternative
N. excursion
| Climate, more than any other single
factor, determines the distribution of life on earth. Climatic boundaries
establish the limits which organisms can survive. Plants, even more than
animals, must be well adapted to climate in order to survive. They cannot move
about or take shelter but must be equipped to endure whatever weather conditions
are likely to occur. In the harsh conditions of the tundra, for example, low
growing mosses, lichens, and a few flowering plants all hug the ground for
shelter from icy winds. Animals, despite their ability to move about and find shelter, are just as much influenced by climate as plants are. Creatures such as the camel and the penguin are so highly specialized that they have an extremely limited distribution. Others, such as bears are flexible enough to adapt to a broad range of climates. Oc A. kind of weather pattern B. form of sea life C. species of tundra plant D. type of miniature penguin 我来回答: 提交
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