B—B—C—011 C 3 5{A}灰度是所扫描物体的密度与厚度这两个参数的共同反映，物体密度越大，灰度越大；厚度越大，灰度越大。

A—B—F—005 B 3 5{A}A: Could you tell me why Flight MU595 hasn’t departed yet?B：{.XZ}

A—B—F—005 B 3 5{A}A: Do you know why my flight has been delayed? B：{.XZ}

A—B—F—004 B 3 5{A}Please go to the airline counter to{.XZ}.

A—B—F—004 B 3 5{A}Please go to the{.XZ} to check in for your flight.

A—B—F—004 B 3 5{A}A: When will Flight MU523 be ready for check-in?B：{.XZ}.

A—B—F—004 B 3 5{A}A:{.XZ}?B： The check-in hasn’t begun yet.

A—B—F—004 B 3 5{A}{.XZ} is the boarding time for your flight?

A—B—F—004 B 3 5{A}A: What’s the check-in time for my flight?B：{.XZ}.

A—B—F—004 B 3 5{A}A: Where’s your destination?B：{.XZ}.

A—B—F—004 B 3 5{A}A: Are you going to take a domestic or an international flight?B：{.XZ}.