of plastics are biodegradable
of plastics are biodegradable
Always since the creation of celluloid, plastics have been found to have a multitude of industrial and commercial uses（） A: Always B: plastics C: have D: multitude
Always since the creation of celluloid, plastics have been found to have a multitude of industrial and commercial uses（） A: Always B: plastics C: have D: multitude
Many people are concerned about the growing ______ of plastics on the environment.
Many people are concerned about the growing ______ of plastics on the environment.
Modern plastics can ______ very high and very low temperatures.
Modern plastics can ______ very high and very low temperatures.
我们这学期学习Moldflow（ ）系列产品 A: Moldflow Plastics Advisers(产品优化顾问) B: Moldflow Plastic Insight(注塑成形模拟分析) C: Moldflow Plastics Xpert (MPX) D: 以上都有
我们这学期学习Moldflow（ ）系列产品 A: Moldflow Plastics Advisers(产品优化顾问) B: Moldflow Plastic Insight(注塑成形模拟分析) C: Moldflow Plastics Xpert (MPX) D: 以上都有
When making modern cameras , people began to _______ plastics for metal.选项错误的是
When making modern cameras , people began to _______ plastics for metal.选项错误的是
The possible gains from plastics retrieved from the sea will far outweigh the costs executed in the clean-up plan.
The possible gains from plastics retrieved from the sea will far outweigh the costs executed in the clean-up plan.
Plastics<br/>today contribute to a wide ______ of industries. A: field B: area C: scope D: range
Plastics<br/>today contribute to a wide ______ of industries. A: field B: area C: scope D: range
Plastics is a kind of ______ which is widely used in industry. A: mass B: substance C: matter D: material
Plastics is a kind of ______ which is widely used in industry. A: mass B: substance C: matter D: material
Plastics are in wide use because they can be easily formed into complex shapes at low cost and are easily mass produced.
Plastics are in wide use because they can be easily formed into complex shapes at low cost and are easily mass produced.