在一个以肌肉为效应器的反射弧中，如果传出神经遭到损伤，而其它部分正常，当感受器受到刺激后将表现为

    Xie Lei ____ a plane for London six months ago to complete a business ____ .She is now halfway through the       3    year. At the beginning, she had to learn almost everything again. She lives with a      4    family, which gives her the         5     to learn more about everyday life and      6     in her new country.

    She wrote her first      7    to her        8     ， but she only got an E. Now she has    9    the life and she feels much more at home and is going to join a few university clubs in order to have a balance between study and a social life. We wish Xie Lei all the best with her    10   Keep it up! Xie Lei.

在一次课外实践活动中，老师要求同学们利用测角仪和皮尺估测教学楼AB的高度．同学们在教学楼的正前方D处用高为1米的测角仪测的教学楼顶端A的仰角为30°，然后他们向教学楼方向前进30米到达E处，又测得A的仰角为60°，则教学楼高度AB是多少米？（精确到0.1米，参考数据 $\sqrt{3}$ =1.732）