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三、 阅读理解A On most plastic packaging(包装) , there's a small triangle(三角) with a letter or a number written inside. These little symbols are not easy to be noticed, but are really important. They tell you what kind of plastic it is and whether it can be recycled or not.Can ...
结果1 题目 (A)On most plastic packaging(包装) , there's a small triangle(三角) with a letter or a number written inside. These little symbols are not easy to be noticed, but are really important. They tell you what kind of plastic it is and whether it can be recycled or not.Can...
aflatshapewith threestraightsides and three angles2something that is shaped like atrianglea triangle of land3amusicalinstrumentmade ofmetalbentinto the shape of a triangle. Youhitit with a metalstickto make aringingsound.4American Englisha flatplasticobjectwith three sides that has oneangleof 90°...
结果1 题目 On the bottom of most plastic packaging(包装), there's a small triangle(三角)with a letter or a number written inside. These little symbols are not easy to be noticed, but are really important. They tell you what kind of plastic it is and whether it can be recycled or ...
结果1 题目 On the bottom of most plastic packaging(包装),there's a small triangle (三角)with a letter or a number written inside.These little symbols are not easy to be noticed,but are really important.They tell you what kind of plastic it is and whether it can be recycled or not....
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Triangle and Trapezoid Waves Triangle/Trapezoid Wave Generation Using PWM With Hercules™ N2HET Copyright © 2015, Texas Instruments Incorporated 3 Low-Pass Filter www.ti.com 2 Low-Pass Filter The low-pass filter is used to remove the high frequency components that are produced on the PWM ...
结果1 题目 On the bottom of most plastic packaging(包装), there'sa small triangle(三角)with a letter or a number written inside. Theseittle symbols are not easy to be noticed, but are really important Theytell you what kind of plastic it is and whether it can be recycled or not.Can...
On the bottom of most plastic packaging(包装), there’s a small triangle (三角)with a letter or a number written inside. These little symbols are not easy to be noticed, but are really important. They tell you what kind of plastic it is and whether it can be recycled or not. Can it...