Ⅰ.阅读词汇·读懂
默想下面单词的词性及含义，不会的在□中做出标记并核对识记。
□1.graph □2.emission □3.melt
□4.seal □5.ecology □6.methane
□7.carbon □8.dioxide □9.fossil
□10.footprint □11.basin □12.penguin
□13.tropical □14.chaos □15.nuclear
□16.jungle □17.smog □18.volume
□19.garbage □20.enterprise □21.waterway
□22.agenda □23.habitable □24.undergo
□25.implement □26.moderate □27.comprehensive,
