module 5 a lesson in a lab period one introduction，reading and vocabulary 同步精练（外研版必修1，课标通用） 时间：45分钟 ⅰ.介、副词填空 1．water exists________a solid, a liquid and a gas. 2．two thirds________the earth's surface is water. 3．the distance of the sun________the earth is very far. 4．steel is the mixture________iron and oxygen. 5．the earth is twice as large________the moon. 6．the metals react the least________the bottom. 7．below is the description________a simple experiment. 8．add some oil________the water. 9．it's hard to think of a world________metals.
