问题详情

What can be inferred about the use of GPS nowadays？

A．GPS can be used nearly 24 hours a day.

B．GPS can be used in certain places in the world.

C．GPS provides great convenience for us.

D．GPS can be used without subscription or setup fees.

此题为多项选择题。请帮忙给出正确答案和分析，谢谢！