考博考试

【单选题】 The immune system ______.
A．used to be unconnected with the brain
B．causes a lot of stress to people
C．can be affected by emotional factors
D．functions independently

网考网参考答案：C
网考网解析：
第二段说生物学家曾认为the immune system was a separate，independent part of our bodies，但最近研究发现our brain can affect our immune system，而疾病也和情绪有关，据此可以判断情绪能够影响免疫系统。 查看试题解析出处>>