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Plastic wastes are becoming a serious environmental problem.
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更多“Plastic wastes are becoming a serious environmental problem.”相关的问题
第3题
A.plastic drum/gunny bag/wooden case
B.wooden case/plastic drum/gunny bag
C.wooden case/gunny bag/plastic drum
D.plastic drum/wooden case/gunny bag
第5题
People can help solve the problem of pollution by______.
A. urging their governments to control litter and waste
B. cutting down the use of oil and other oil products
C. reducing unnecessary buying, over-consumption and careless disposal of wastes
D. making anti-pollution advertisements
第8题
Figure 2 is a stress-strain diagram. 1) Label A) tensile strength, B) yield strength, C) plastic region, D) elastic region, E) Modulus of elasticity; 2) Is this stress-strain diagram for a ductile material or a brittle material？ Give two reasons to support your answer.
第9题
A.when plastic becomes small enough to enter our food chain
B.because other animals are being killed by plastic
C.because plastic does not biodegrade
D.from plastic bags from supermarkets
第10题
A.错误
B.正确
第11题
These plastic flowers look so ______ that many people think they arc real.
A．beautiful
B．natural
C．artificial
D．similar
