北師大版高中英語選修七unit 20《new frontiers》（lesson 1）練習(xí)題-預(yù)覽頁(yè)
【正文】 rket for oils exists. Small batch presses can be made of local cost is are not difficult to they are easy to small presses produce good quality the work is getting all the oil from the seeds can be difficult. If there is a large supply of seeds,then handoperated presses may not be enough to support a powered presses that can operate all day are needed. Title How to 1. Oils from Seeds 2. of oils People use oils when they cook meals,paint pictures and clean objects. Method 1 ● Crush the seeds between two stones and then put them into a cloth bag. ● 3. the cloth bag of the oil will flow out of the bag. ● The 4. oil in the seeds can be got by putting more heavy rocks on them. Method 2 ● A box is used to 5. several bags of seeds. ● Place a heavy cover on the bags. ● Use a long wooden stick to push the cover slowly. ● The 6. of oils relies on the pressure placed on the bags. Small batch presses ● They are at a low 7. . ● They are easy to operate and repair. ● They can be used in areas 8. of electricity or gasoline. ● They can be operated by hand very conveniently. ● They can produce good quality oils. Large 9. presses ● It is easy to get all the oil from the seeds. ● They can 10. with a large supply of seeds and support a business. ● They can run all day. 答案 :
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