【单选题】环境学作为一门科学,其最重要的标志性事件是 ( )
【单选题】He was accepted by the gentleman because
B.
he didn’t have a single recommendation
【单选题】He has accepted the job because he likes challenge, and the chance of dealing with difficult problems ____ to him.
【单选题】环境学,作为一门科学,其最重要的标志性事件是( )