【单选题】She found her watch ______ she lost it.
【单选题】在气相色谱法中,氢火焰离子化检测器优于热导检测器方面为( )
【单选题】She was supposed ______ at home at the moment, but her mother found her in the park.
【简答题】A.She wanted to obey, her mother. B.She found no one willing to listen to her. C.She thought it was shameful to have . D.She was afraid of being looked down upon.
【单选题】在气相色谱法中,氢火焰离子化检测器优于热导检测器的方面为( )