在Scopus数据库的高级检索中，检索期刊名称中包含"polymer",同时论文题目中含有"crystal"的文献，正确的检索式为： A: SRCTITLE(polymer) and TITLE(crystal) B: SRCTITLE=polymer and TITLE=crystal C: polymer wn journal and crystal wn ti D: polymer/st and crystal/ti

​______, ______ and ______ are the polymer materials.‌ A: Starch B: Protein C: Leather D: Sugar

下列（）为聚合物。 A: monomer B: polymer C: molecule D: atom

A polymer is a large molecule, or ___________, composed of many repeated subunits. A: superglue B: superconductor C: elastomer D: macromolecule

Fiber reinforced polymer mainly refers to composite materials. If carbon fiber is embedded in epoxy resin, the strength of the composite will be increased.

Which of the following liquids is Newtonian fluid A: Polymer solution B: Colloid solution C: Paclitaxel emulsion D: Bacterial oil

翻译句子：It is essentially the“giantness”of the size of the polymer molecule that makes its behavior different from that of a commonly known chemical compound such as benzene.

以下句子的改写反映了学术论文的什么特点？<br/>The polymer dope was poured onto a glass plate and cast slowly by a casting knife with a gap of 200 µm. --&gt; The polymer dope was poured onto a glass plate and cast with a rate of 800 mm/min by a casting knife with a gap of 200 μm. A: 准确 B: 简洁 C: 客观 D: 专业

For fabrication of fiber reinforced composite, in which one weak<br/>interface is desired to ensure the composite possess high toughness.(<br/>) A: Carbon fiber reinforced titanium. B: Carbon fiber reinforced carbon composite. C: Glass fiber reinforced polymer.

The<br/>average number of monomer molecules contained in a polymer molecule<br/>is called ________. A: number-average<br/>degree of polymerization B: kinetic<br/>chain length C: weight-average<br/>degree of polymerization D: number<br/>of structure units