<綜合測驗>[題組:第11-15題]We all know that too much stress is not good for our health, but too little is not ideal, either. While 11 stress can be dangerous to the body, short-term stress is actually healthy. Short-term stress triggers the production of protective chemicals in our body and strengthens the body’s defenses. 12 our body is in a vulnerable situation, a burst of stress will quickly mobilize the body’s own repair system to defend the damaged areas. This 13 us from physical discomfort and sickness. Small amounts of stress hormones may even sharpen our memory. A recent study found that when rats were forced to swim-an activity that places them under stress for a short while-they remembered their way through mazes far 14 than rats that were in a relaxed state. The key to a healthy lifestyle is to keep our stress level 15 . Too much stress will make us cranky and sick. Too little stress, on the other hand, will lead to boredom and low motivation. 11. (A) contagious (B) chronic (C) diagnostic (D) tedious
