【简答题】Have you ever hoped a toy balloon? They are very light. But there are much bigger balloons can fly very high up in the sky. They are big enough to carry people. They are called hot-air balloons. To ma...
【判断题】地面吸收的太阳总辐射与地面有效辐射之差称为地面辐射差额。
【简答题】地面吸收的太阳总辐射与地面有效辐射之差称为 。
【多选题】下列选项中,属于政府采购方式的是( )。
【判断题】在EPQ量表中,E维度高分则此人人格外向,可能是渴望刺激和冒险;情感易于外露、冲动;喜欢参加人多热闹的聚会,好交际;开朗、活泼。