压力、适应和恒定状态三者具有一定的关系,压力是原因,适应是目的,而恒定状态是过程。()
参考答案:错
The old man sat before the fire in a trance , thinking of his past life.
A.in a special position
B.in a cozy state
C.in a sleepy state
D.in a meditative state
接触生产性粉尘可引起的工作有关疾病是()
A.胸膜间皮瘤
B.石棉肺
C.尘肺
D.肺癌
E.慢性气管炎