因式分-9x2y-6xyz=______．
-9x2y-6xyz=-3xy（3x+2z），
故答案为：-3xy（3x+2z）．
依照国家有关安全防范行业标准规定，营业场所内部存款业务区属于（）风险区。
A.低度
B.中度
C.高度
D.重点
It is deemed as impolite to leave a party without saying "good-bye" to the host.
A. insisted B. condemned C. convinced D. considered
