单项选择题According to the passage, what helps to coordinate the complex physical activity of a mammal
单项选择题【B1】()
A.mentalB.spiritualC.physicalD.neural
单项选择题It can be inferred from the passage that insects do not have ________.
单项选择题A.20B.22C.21D.23
单项选择题Which of the following is NOT true