兴奋性
参考答案:
指机体组织或细胞接受刺激后发生反应的能力或特性。
2. ---- English, as a living language, ________ all the time.
---- Right. Who knows what it will be like in the years to come?
A.will change
B.is changing
C.was changing
D.has changed
清筛机在运行前须在驾驶室内对换挡手柄进行怎样的转换?