【简答题】Plastics are considered one of the most serious pollutants causing environmental problems. The garbage containing plastics end up in the waterways that ually flow into the oceans. Accumulation (聚...
【单选题】书店取名为 “输电”采用了( )的创意技法
【单选题】There are many kinds of synthetic materials, ______ plastics are the most common.
【单选题】Which of the following is NOT the character of plastics?
A.
Most electronic products contain plastics.
B.
It retains its original strength through reprocessing.
C.
Recycled plastics can be integrated into new products.
D.
Plastics will lose flexibility after a certain period of time.
【单选题】Why do plastics antiques bring a shock to most people'?
A.
Because they are very fragile and hard to maintain.
B.
Because they might cause certain pollution to environment.
C.
Because plastics is so common and easy to find around people.
D.
Because people don't take plastics seriously.
【单选题】______ are chiefly derived from petroleum.
B.
There are plastics today
C.
Because today plastics today
【判断题】Most plastics lose their strength at relatively low temperature.