单项选择题
One way negotiators may convey the message that "this i...
单项选择题One way negotiators may convey the message that "this is the last offer" is by making the last concession substantial. （ ） A. 对 B. 错
The loop integral of the force in the conservative forc...
单项选择题The loop integral of the force in the conservative force field may not be zero. （ ） A. 对 B. 错
In western restaurants, the bill usually includes tax a...
单项选择题In western restaurants, the bill usually includes tax and service charge. A、正确 B、错误
