21. Students entering the design competition have to
A: produce an energy-efficient design.
B: adapt an existing energy-saving appliance.
C: develop a new use for current technology.
A: produce an energy-efficient design.
B: adapt an existing energy-saving appliance.
C: develop a new use for current technology.
举一反三
- This company is planning to develop and produce ____ cars and components in the country. A: energy efficiency B: energy efficient C: energy efficiently D: energy effectively
- The project of railway switch snow protection system based on the principle of the air umbrella, was the second prize winner of the: A: the First China-US Young Maker Competition B: the 10th National Competition of Transport Science and Technology for Students C: the 10th National University Student Social Practice and Science Contest on Energy Saving & Emission Reduction D: the 6th National Mechanical Innovation Design Competition
- The project of railway switch snow protection system based on the principle of the air umbrella, was the second prize winner of the: A: the First China-US Young Maker Competition B: the 10th National Competition of Transport Science and Technology for Students C: the 10th National University Student Social Practice and Science Contest on Energy Saving & Emission Reduction D: the 6th National Mechanical Innovation Design Competition
- The project of railway switch snow protection system based on the principle of the air umbrella, was the second prize winner of the: A: the First China-US Young Maker Competition B: the 10th National Competition of Transport Science and Technology for Students C: the 10th National University Student Social Practice and Science Contest on Energy Saving & Emission Reduction D: the 6th National Mechanical Innovation Design Competition
- The project of railway switch snow protection system based on the principle of the air umbrella, was the second prize winner of the: A: the First China-US Young Maker Competition B: the 10th National Competition of Transport Science and Technology for Students C: the 10th National University Student Social Practice and Science Contest on Energy Saving & Emission Reduction D: the 6th National Mechanical Innovation Design Competition