分解因式：xy-xz+y-z=______．
xy-xz+y-z=x（y-z）+（y-z）=（y-z）（x+1）．
故答案为：（y-z）（x+1）
--- Excuse me. Is there a hotel ________ the hospital?
--- Yes. It’s also next to a bank, so the hotel is between the hospital and the bank.
A. across from
B. next to
C. in front of
直流小母线负极相色漆规定涂（）。
A.蓝色
B.白色
C.赭色
D.黑色
