2. 外语
  3. By now, how the immune system is affected by stress has been well-documented. In one study【C1】______newlywed couples, for exampl

By now, how the immune system is affected by stress has been well-documented. In one study【C1】______newlywed couples, for exampl

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问题     By now, how the immune system is affected by stress has been well-documented. In one study【C1】______newlywed couples, for example, those who showed【C2】______behavior during a 30-minute discussion about marriage problems had lower immune【C3】______for the 24-hour period following the experiment than people who showed less【C4】______behavior. It is not just stress that can do damage. One researcher thought that【C5】______the same cold virus was put【C6】______two different noses, the person who is depressed or anxious or pessimistic would be more likely to develop the cold.
    What is it about stress and related emotions【C7】______can encourage poor health? These feelings can cause the【C8】______of substances that damage or weaken our immune cells. Negative【C9】______can also cause our bodies to produce fewer immuno-transmitters that【C10】______help fight off disease.
    If stress, depression, anger and other negative feelings can make you more likely to get sick, can the【C11】______be true? Will you have a stronger immune【C12】______and greater health if you are happier, less stressed, and more【C13】______? Experts believe that the answer is yes. There are studies showing that by【C14】______certain mind-body techniques that help reduce stress and improve outlook, cancer patients can live longer.【C15】______cancer patients aren’t the only ones who can benefit.
    Research has found that when patients with chronic pain used【C16】______therapies and other behavioral technique to【C17】______discomfort, they reduced their visits to the doctors by 36%. Relaxation produces better health through deep, rhythmic breathing, muscle【C18】______. and a slower heart rate. When some of the tension is taken out of the body, the【C19】______is taken off the entire system. Relaxation decreases blood pressure and heart rate and increases one’s sense of well-being. That is important because a body that is【C20】______tense will eventually give out.
【C5】
选项 A、whether
B、when
C、if
D、for
答案C
解析 结构衔接题。空前的that引导宾语从句，该宾语从句中又嵌套一个状语从句，本空所填词引导状语从句。该状语从句是说两个不同的人通过鼻子吸进同一种感冒病毒，消极的那个人更容易息上感冒。本句中的would be提示该状语从句为虚拟条件从句，选项中只有[C]if可以引导虚拟条件状语从句，故答案为[C]。
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