循环血量减少引起肾素释放的感受器()
A.颈动脉窦压力感受器
B.左心房和腔静脉容量感受器
C.下丘脑渗透压感受器
D.颈动脉体化学感受器
E.A球小动脉牵张感受器
参考答案:E
Children under sixteen are not permitted to participate in such kind of activities ________ bad for their mental development.
A.as is
B.as are
C.that are
D.that they are
哪些情况下机组应紧急故障停机?