反射是人和动物都具有的,但条件反射是人类所特有的。[ ]
×
—I’m sorry. There was too much traffic on the road.
—Don’t be late again. The meeting for 15 minutes.
A.has begun
B.has stopped
C.has been on
D.has finished
牙关紧闭及角弓反张是何种细菌感染所致
A.破伤风梭菌B.腊肠杆菌C.炭疽杆菌D.白喉杆菌E.肉毒梭菌