攻邪学派
参考答案：以攻击邪气作为治病的首要任务，强调邪留则正伤，邪去则正安之理，善于运用汗吐下二法，以张从正为代表人物。
All mammals have hair, but not always evident.
A．but it is not
B．but it is
C．but they are not
D．but they are
