[简答题]Plastic 的制作It decomposes by light

[简答题]Plastic 的制作first plastic made in a laboratory

[简答题]Plastic 的制作recycled pens

[简答题]Plastic 的制作Plastic is commonly found on : product such as detergent bottles, milk jugs (dairy product bottles )

[简答题]Plastic 的制作Cellulose is not like real plastic because it becomes haed when heat

[简答题]Plastic 的制作use cotton and acid

[简答题]Plastic 的制作a chemist name Alexander Parkes developed the first plastic

[简答题]Plastic 的制作Disadvantage: it will produce gases In some cases, burning it could release toxic fumes.Also, the manufacturing of plastics often created large quantities of chemical pollutants.

[简答题]Plastic 的制作First is used to produce artificial silk

[简答题]Plastic 的制作Natural rubber wood no longer had a stranglehold on rubber supplies.

[填空题] Plastic Bag Pollution
The use of plastic bags has increased at an alarming rate since they became popular in the 1980s. Big black bin liners, plastic carrier bags carrying advertising logos, clear sandwich bags and a variety of other forms. They’re lightweight, handy and easily discarded. Too easily discarded. Just take a look around you. Plastic bags can be seen hanging from the branches, flying in the air, settled amongst bushes and floating on rivers. They block up drains causing water and sewage to overflow and become the breeding grounds of bacteria that cause diseases.
Plastic bags are difficult and costly to recycle and most end up on landfill sites where they take around 300 years to decay. They break down into tiny toxic (有毒的) particles that pollute the soil and waterways and enter the food chain when animals accidentally consume them. But the problems surrounding waste plastic bags start long before they

[简答题]一个女孩介绍她制作的mini rocket，分3种。plastic bottle

[简答题]light industrial products

[简答题]light industries