绘出下面三种情况中防潮层的位置(用粗虚线表示)。每图位置、数量、线型正确得2分,共10分。（1）地面垫层为不透水材料 （2）地面垫层为透水材料 （3）室内地面有高差

<img src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/1527562785845f773f28a80e946f49096de4adfc2687a.png" alt="上传图片"><br><br/><img src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/15275628079937bee246030d941e6a7e437ee43789f69.png" alt="上传图片"><br><br/><img src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/1527562822872728c983b590b4b5ea792cd2e646d2a32.png" alt="上传图片"><br>