二号线共26座车站，（）公里，17座地下站，9座地上站。
参考答案：37.5
Why are you worried?
I’m expecting a call from my daughter. She ______ New York for three years.
A．has gone to
B．has been to
C．has been in
D．has come in
执行价格是指期权的买卖双方敲定的期货期权合约的价格。（）
