Unit 4 Astronomy：The science of the stars
unit 4 astronomy：the science of the stars
1. spread
vt.&vi. 展开,铺开;散布;扩大;延伸
the bird spread its wings. 那只鸟展开了翅膀。
flies spread disease. 苍蝇传播疾病。
常用结构:
spread sth. with sth. 用……抹/涂/铺……
spread ...on ...把……抹/涂/铺在……
be spread for摆好（桌子）准备
spread oneself\[口\]舒展四肢(躺下)
spread out张开，伸开，铺开，展开，伸长
高手过招
单项填空
paper making began in china and to europe.
(•12•河南郑州检测)
a. spread b. grew
c. carried d. developed
解析:选a。句意为：造纸术起源于中国，又传播到了欧洲。spread传播。
2. method
n. 方法
he has introduced a new method of teaching.
他引进了一种新的教学方法。
what is the most effective method of birth control?
控制出生率的最有效的方法是什么？
联想拓展
by this means=in this way=with this method
用这种方法
易混辨析
method/means
method侧重“理论方法”，指做某事的具体步骤或程序。
a new teaching method一种新的教学方法
means（单复数同形）侧重“通过手段”或“利用工具”去达到某种目的。
高手过招
选词填空(method/means)（原创）
①the quickest of travel is by plane.
②she has a very scientific of dealing with political problems.
答案：①means②method
3. harmful
adj. 有害的
常用结构:
do sb. harm/do harm to sb. 对某人有害
mean no harm 无意伤害别人;没有恶意
harm one’s image/reputation 损害某人的形象/名声
do more harm than good 弊大于利
there is no harm in (sb.s) doing sth.
=it does no harm (for sb.) to do sth. (某人) 做某事无害处
be harmful to 对……有害
harm n.&v. 损害，伤害
smoking is harmful to your health. 吸烟有害健康。
高手过招
单项填空
he is a nice dog. he won’t do you any .（原创）
a. ill b. bite c. hurt d. harm
解析:选d。考查固定搭配。do sb. harm/do harm to sb. 表示
“对某人有害”。句意为：这是一条温顺的狗，它不会伤害你。
故选d。
4. mass
n. 质量；团；块；大量；(前加the) 群众
a liter of gas has less mass than a liter of water.
