“手机＋宽带＋3G无线上网卡”校园融合套餐中手机业务和宽带业务都是必选项。
参考答案：错
解析：（手机为可选）
This is one of the happiest days ____ spent in my life.
A．that have ever been
B．that has never been
C．which was ever
D．that had been
某飞行员驾机从A机场（30°N，120°E）起飞，为了经济省时，飞机必须沿最短航线飞往B机场（35°S，60°W）执行任务。据此回答问题。
最短航程为（）
A.175×111km
B.185×111km
C.65×111km
D.155×111km
