21.According to Paragraph I, museums are faced with difficulties in
[A]maintaining their plastic items.
[ B]obtaining durable plastic artifacts.
[ CJ handling outdated plastic exhibits.
[ D]classifying their plastic collections.考研英语试题
22.Van Oosten believes that certain plastic objects are
[ A]immune to decay.
[ B]improperly shaped.
[ CJ inherently flawed.
[ D]complex in structure.
23.Museums stopped exhibiting some of Gilardi's artworks to
[ A]keep them from hurting visitors.
[ B]duplicate them for future display.
[ CJ have their ingredients analyzed.
[ D]prevent them from further damage.
24.The author thinks that preservation of plastics is
[ A]costly.
[ B]unworthy.
[ C]unpopular.
[ D]challenging.
25.In Ferreira's opinion, preservation of plastic artifacts
[A]will inspire future scientific research.
[ B]has profound historical significance.
[ CJ will help us separate the material ages.
[ D] has an impact on today's cultural life.
英语（一）试题．4. （共14页）