风口高度是指（）与（）之间的距离。
参考答案：风口中心线，铁口中心线
下列说法错误的是（ ）
A．氧气具有可燃性
B．活性炭有强吸附性
C．氢氧化钠有强烈的腐蚀性
D．水果、蔬菜富含人体所需的维生素
--- Guess what, we’ve got our visas for a short-term visit to the UK this winter.
--- How nice! You ______ a different culture then.
A. will be experiencing
B. were experiencing
C. have experienced
D. will have experienced
