Module 5 A Lesson in a Lab
Period One
Warmup and ReadingLanguage Focus
1.When you heat a metal,it expands.当你加热金属时，它就会 膨胀。 [归纳拓展] expand v.扩大，扩充；阐述；膨胀 expand on/upon sth.详述；详细阐明 expansion n.扩张；膨胀 expansive adj.易膨胀的；易扩张的；广阔的
[ 语境助记] (1)His company expanded into a big one. 他的公司扩大成为大公司。 他的公司扩大成为大公司。 (2)Air expands when heated. 空气受热膨胀。 空气受热膨胀。 (3)Reading can expand our horizons. 阅读能拓展我们的视野。 阅读能拓展我们的视野。
expand,extend,spread (1)expand (使)(尺寸、 数字或数量等)扩大， 增加(活动量), 扩大(活 动范围)。 (2)extend 延伸，延长(建筑或道路、时间等);扩大(控制、影响力 等);伸展(手臂、腿等)。 (3)spread 把(物)铺开、 张开；(疾病、 感情、 问题或火等)蔓延；(消 息、思想等)流传，传播；扩展(使能覆盖大的面积),张开。
[题组训练] (1)用 expand,extend,spread 的适当形式填空 ①He expanded ②They extended ③The firespread
on his new theory in his book. the subway to the suburbs. very quickly. rapidly in the 1960s.
④Sydney’s population expanded
(2)Why not try to A.expend;on C.expand;/
B
your story
a novel?
B.expand;into D.expand;on
解析
expend 花费，与题意不符；expand 扩展，与 into 连用，
表示“扩展 成为 ”;expand on 详述。句意为：你怎么 不把你的故事扩展成小说呢？
When you heat a metal, it contracts.
contract vi.&vt. 收缩；签署；n.[C]合同
contract (with)sb. to do sth.就某事与某人签订合同 enter into/make/sign a contract签合同 eg.1.The employees advised that they should renew their _______within a week. C A. connection B. contact C. contract D. construction contracts 2.You can see your stomach____________and expands when you breathe in and breathe out.
2.Twothir ds of the ear th ’s sur face is water.地球表面的三分 之二是水。 [ 归纳拓展 ] 句中的 twothir ds 意为“三分之二”。 分数的构成是： 分子 用基数词， 分母用序数词， 分子大于 1 时， 分母序数词加s。 注意：以分数、百分数作主语时，谓语动词用单数还是复 数，取决于后面的名词。若这个名词是单数或不可数名词 时，谓语动词用单数，否则用复数。
[ 语境助记] (1)Twofifths of the students have r efer ence books. 五分之二的学生有参考书。 (2)Onefifth of the money has been wasted. 五分之一的钱已浪费掉了。are (3)More than 50 per cent students of our school ar e fr om the
countr yside. 我们学校 50% 以上的学生来自农村。
[题组训练] (1)用所给词的正确形式填空
is (be) used to feed animals. ②Ninety percent of the smokers are (be) male. C (2) of the people on the net China
’s economy is among the strongest in the world. A.Fourfifth;believes B.Fourfifth;believe C.Fourfifths;believe D.Fourfifths;believes①Twofifths of the grain解析 考查分数表达法和主谓一致。表示分数时，分子大于 1 时，表示分母的序数词加s,故 4/5 应表示为 fourfifths;“分 数+of+名词”作主语时， 谓语动词的单复数与 of 后的名词一 致，所以正确选项为 C 项。
3.Different metals have different uses,for example,steel is used in cars, and iron is used in electrical equipment.不同的 金属有不同的用途，例如，钢被用于汽车，铁被用于电器设 备。 [归纳拓展] equipment n.设备；装备 equip v.装备 equip sb./sth.with sth.用某物装备某人/某物 be equipped with...装备着 注意：equipment 为不可数名词，表示件数用 piece。
[语境助记] (1)The store sells tents and other camping equipment. 这家商店出售帐篷和其他野营设备。 (2)Their schools are very poorly/well equipped. 他们学校装备简陋/齐全。
[题组训练] (1)单句改错 Our school bought a lot of advanced equipments to equip our labs. (2)The course aims to
equipments→equipment
equip
people with
the skills
necessary for a job in this technological age. 本课程旨在使人们掌握科技时代工作所必需的技能。
4.When we use metals,it is important to know how they react with different substances,for example,water and oxygen. 当我们使用金属时，了解金属和诸如水、氧气之类的不同物 质如何发生反应很重要。 [归纳拓展] react vi.(化学)反应 react with 与 发生化学反应 react to sb./sth.对某人/某物作出反应 react against sb./sth.反对/反抗某人/某物 react on/upon sb./sth.对某人/某事物有影响
[语境助记] (1)How did they react to your suggestion? 他们对你的建议有什么反应？ (2)Children tend to react against their parents by going against their wishes. 孩子们倾向于违背父母的愿望来反抗父母。 (3)Applause reacts upon/on a speaker. 鼓掌对演讲人会有影响。
[题组训练] 用适当的介词填空 (1)Many chemical substances react with (2)Our eyes react to (3)The students reacted the light. oxygen.
against
the social system.
