横行穿经腮腺的血管神经有()、()、()。
参考答案:上颌动静脉;面横动静脉;面神经
We’d better _________ when he is thinking, as he prefers to solve problems on his own.
A.wake him up
B.set him aside
C.leave him alone
D.ring him up
公安部和县级以上地方各级人民政府公安机关建立的督察机构,由公安人员组成。( )