Module 5 A Lesson in a Lab功能Using sequence（运用先后顺序）first, then, next, after that, lastly句型1．The earth is fortynine times larger than the moon.地球是月球的 49 倍大。2．Twothirds of the earth's surface is water.地球表面的三分之二被水覆盖。3．It is hard to think of a world without metals.很难想象一个没有金属的世界。4．Below is a description of a simple scientific experiment.下面是一个简单的科学实验的描述。5．The closer you are, the more you'll see.你靠得越近，看得就越多。语法Degrees of comparison（比较级写作Describing a simple scientific experiment（描述一项简单的科学实验）考点分数表达法（2011 四川高考，18）；it 作形式主语（2011 江苏高考，26）；倍数关系（2011 陕西高考，17）；in return（2010 江西高考，29）；be supposed to（2011 辽宁高考，22）进入实验室的人们都必须遵守有关的规章制度，让我们一起来了解一下这些规章制度吧！Laboratory Safety RulesScience is a handson（实际操作的）laboratory class.You will be doing many lab activities which may need the use of chemicals or equipment.To make sure of a safe science classroom, we provide you with a list of rules.These rules must be followed at all times.GENERAL GUIDELINES（准则）1 ． Never work alone.No student may work in the lab without a teacher present.2 ． When first entering a lab, do not touch any equipment, chemicals, or other materials in the lab until you are asked to do so.3．Do not eat, drink, or chew gum in the lab.Do not use lab glassware as containers for food or drinks.4 ． Know the positions and operating procedures （ 程 序 ） of all safety equipment, including the first aid kit and the fire extinguisher（灭火器）．Know where the fire alarms and the exits are.5．Check the label（标签）on chemical bottles twice before removing any of the chemicals.Take only as many chemicals as you n...
