下面的短文有10处空白，每处空白后的括号内有一个词，请根据短文内容将其正确的形填入文中，以恢复文章原貌。How to Deal With Pressure?With the current mood of global 41 (certain) and an ___42____(economy) recession, peoplere likely to suffer from increased stress, depression and anxiety. These___43____(psychology) symptoms（症状）, in a new twist to the old saying of“mind over matter”, can lead to actual physical problems. The mind and the body are ___44____(integrate) system. It's like a web. If one part is 45 (disturb) , it will directly or indirectly, affect another part. Hence, psychological and emotional reactions will trigger physical responses. When a person feels a threat to his well-being, the brain reacts by 46 (release) chemicals. or example, the adrenal gland(肾上腺) in the brain may release adrenaline(肾上腺素) whichprepares the body to respond to physical threats. The brain's neuro-chemistry（神经化学）programs a person to react in one of the classic ways:fight, flight or fright. Are you sleeping well?Are you eating well?Are you working or studying well?Any mental health problem would affect these three areas of behavior. Some people deal with stress and 47 (anxious) by turning to 48 (religious) , others by talking to friends and family. But are there other options?Exercise is a good outlet. Play a game. Go jogging. You will be ___49___(concentrate) on doing something. There is a target to be___50____(achieve) and will occupy your mind. Go Karaoke singing and dancing with friends. The worst thing to do is to sit at home and think.
Compared with dreamless sleep, deep dream sleep is
A、not the result of natural selection
B、less likely to appear to monkeys
C、more protective to the animals
D、at a higher stage of evolution
It can be inferred from the passage that animals that are prey rarely experience dream sleep because they
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