A-A+
Laudenslager's experiment showed that the immu
问题详情
Laudenslager"s experiment showed that the immune system of those rats who could turn off the electricity______.
A．was altered
B．was strengthened
C．was weakened
D．was not affected
参考答案
正确答案：D
解析：因为由第一段可知，Landenslager发现那些无助的老鼠(而不是那些可以随时切断电流的老鼠)的免疫反应是低于正常的。换句话说，实验表明那些能够切断电源的老鼠的免疫力是没受到影响的。故选D项。
