轨道交通所采用单一票价的计价方式的缺点是（）。

单项选择题以下哪句英语表示为“请右手持卡，在这里刷卡”。（）

A.Please wait a moment.Let me checkit.Your card is degaussing.
B.Hold the card in your right hand and swipe it here.
C.Please wait for the train at the opposite platform.
D.You can return the ticket at the Ticket Center.

单项选择题以下哪句英语表示为“请不要倚靠站台门”。（）

A.Please stand clear of the Adoor.
B.Please wait for the trainat the opposite platform.
C.Please lean on the door.
D.Please pay the excess fare.

单项选择题以下哪句英语表示为“乘扶梯上楼，然后向左转”。（）

A.Take the escalator upstairs，and turn left.
B.Take the escalator upstairs，and turn right.
C.Those are dangerous articles.You are not allowed to take them on board
D.I want to recharge my IC card.

单项选择题“Where can I get a ticket？”以下最适合的答案为（）。

A.That’s three yuan.
B.It’s over there.
C.Thank you.
D.You are welcome.

单项选择题“Is it free with this certificate?” 以下最适合的回答（）

A.Yes，you will.
B.Sorry，it’s not valid on subwaytrains.
C.Yes，I can.
D.Sorry，I don’t know.