可持续发展的涵义具有以下（）等几个最基本的要点。
A.公平性原则
B.持续性原则
C.共同性原则
D.动态性原则
参考答案：A, B, C
______ being an outstanding physician and scientist, he was an accomplished writer and a gifted artist.
A．As far as
B．As well as
C．As soon as
D．As long as
装置停工时，通过（）可以逐渐改变系统的热平衡状态。
A、降压
B、置换
C、降量
D、洗涤床层
