3. What made Happy different from Maxine and Patty?
A. She used her nose to search behind the mirror.
B. She recognized her own image in the mirror.
C. She painted a mark on her own face.
D. She found the hidden camera.
答案:B。推理判断题。由倒数第二段可推出Happy能辨别出自己在镜子中的形象。
(2015·山东省威海市二模)
Run, swim, lift weights, do yoga—do something, because it's good for you. Many studies tell us that regular exercise not only helps our bodies but improves memory, and eases anxiety. But what is happening to the mind during workout to create all these benefits?
A new study from Sweden suggests that a specific protein found in trained muscles might contribute to exercise's mental benefits. This protein, the researchers found, might help our bodies process molecules that, if out of balance, can stress us and contribute to depression(萎靡不振). The findings were published in the journal Cell.
To test this, the researchers kept attacking some mice with flashing lights, loud noises and interrupting their sleep for weeks. Predictably, this treatment makes the mice show signs and biochemical markers of depression.
But not all the mice showed those signs. One group, specially raised to have high levels of a protein called PGC1alpha1 (the one in trained muscles), did not show those depression signs. PGC1alpha1 increases production of an enzyme that breaks down a chemical called kynurenine. Kynurenine helps the body respond to an activated immune system(活性免疫系统), but it also plays a role in depression.
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