Unit4 Globalwarming
单元要览本单元的中心话题是人类当今面临的环境问题，主要探讨了“全球变暖”和“节约能源”等方面的问题。由于人类过多使用不可再生能源，大气中二氧化碳的含量逐年增加，导致全球气温上升。通过学习本单元，让学生了解能源分为“不可再生能源”和“可再生能源”，帮助学生树立“节约能源、保护环境”的主人翁意识。本单元的主要教学内容如下表所示：
类别
课程标准要求掌握的内容
话题
global warming，pollution and the importance of protecting the earth
[来源:学|科|网]
[来源:第一范文网]
[来源:学_科_网z_x_x_k]
[来源:第一范文网]
词
汇
tend[来源:学|科|网]
v.趋向；易于；照顾
catastrophe
n.大灾难；浩劫
oppose
v.反对；反抗；与(某人)较量
flood
n.洪水；水灾
state
v.陈述；说明
consequence
n.结果；后果；影响
glance
v.看一下；扫视 n.一瞥
existence
n.生存；存在
quantity
n.量；数量
commitment
n.承诺；交托；信奉
range
n.种类；范围
pollution
n.污染；弄脏
tendency
n. 趋向；趋势
growth
n.增长；生长
circumstance
n.环境；情况
motor
n.发动机
opposed
adj.反对的，对立的
can
n.容器；罐头
steady
adj. 平稳的；持续的
microwave
n.微波炉；微波
widespread
adj.分布广的；普遍的
educator
n.教育工作者；教育家
average
adj.平均的
contribution
n.贡献
consume
v.消费；消耗；耗尽；吃完
presentation
n.显示；演出
subscribe
v.同意；捐赠；订阅
disagreement
n.分歧；不一致
advocate
v.拥护；提倡；主张
random
adj.胡乱的；任意的
refresh
v. 使恢复；使振作
mild
adj.温和的；温柔的；淡的
graph
n.图表；坐标图；曲线图
outer
adj.外部的
phenomenon
n.现象
electrical
adj.电的；与电有关的
fuel
n.燃料
casual
adj.随便的；偶然的
data
n.资料；数据
nuclear
adj.核的；核能的
trend
n.趋势；倾向
per
prep.每；每一
come about 发生； keep on 继续 subscribe to 同意；赞成；订购 on the whole 大体上；基本上 quantities of 大量的 on behalf of 代表……一方；作为……的代言人 go up 上升；增长；升起 put up with 忍受；容忍 result in 导致 so long as 只要 be opposed to 反对 and so on 等等 even if 即使 greenhouse effect 温室效应 句 型 1....it_is human activity that has caused this global warming... (emphatic “it”) 2....it is a rapid increase when_compared_to other natural changes.(ellipsis) 3.there is no doubt that_the_earth_is_becoming_warmer...(the appositive clause) 4.without the “greenhouse effect”，the earth would_be about thirty－three degrees celsius cooler than it is.(the subjunctive mood) 功 能 1.同意与不同意(agreement and disagreement) exactly.you're right. i agree. that's correct/true/right. i'm afraid i disagree with you. i'm afraid not. i don't think so. no way. i don't agree. i doubt... 2.责备与抱怨(blame and complaint) i'm sorry to bring this up，but... i'm sorry to have to say this，but... they shouldn't have done it. they are to blame.
