从运输性质上，城市综合交通可分为（）两大类型。

A.城市对外交通

B.城市对内交通

C.客运交通

D.货运交通

E.路面交通

Which of the following is NOT a form of wage erosion

According to the passage, what did giant businesses like AT&T, Boise Cascade and Starwood Hotels do to their employees

A．They reduced the employees’ compensations.
B．They froze pays.
C．They fired many workers.
D．They no longer offered pension or health insurance.