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
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
举一反三
- What's right about the general properties of crystal? A: If there are anions in a crystal, there must be cations B: If there are anions in a crystal, there must be cations C: There are not necessarily chemical bonds in molecular crystals D: There must be no covalent bond in the ionic crystal
- An ionic crystal consists of cations and anions, therefore, the ionic crystal can conduct electricity.
- The sequence of reagents used in Gram staining is () A: Safranin solution → iodine solution → alcohol →<br/>crystal violet B: crystal violet → alcohol → iodine solution → Safranin<br/>solution C: Crystal violet → iodine solution → alcohol → Safranin<br/>solution D: Safranin solution → alcohol → crystal violet → iodine<br/>solution E: Safranin solution → crystal violet → iodine solution →<br/>alcohol
- 下列（）为聚合物。 A: monomer B: polymer C: molecule D: atom
- ______, ______ and ______ are the polymer materials. A: Starch B: Protein C: Leather D: Sugar