在我国的各种政治力量中，各民主党派也可以领导公安工作。 ( )
参考答案：错
You should tell your mother _____________now.
A．what you are doing
B．what are you doing
C．what you were doing
D．what were you doing
意向性震颤（）。
A.反射弧损害
B.基底神经节损害
C.锥体束损害
D.神经系统兴奋性增高
E.小脑半球损害
