任何单位和个人不得以（）投放运力等不正当理由拒绝、阻挠实施客运班线经营许可。
参考答案：对等
Since Jack was laid off from his job three months ago, he a new one, but without luck.
A．looked for
B．bad looked for
C．is looking for
D．has been loking for
当普通股的市价低于认股价格时，认股权证的理论价值等于零。( )
