此题为判断题(对,错)。
第1题:
XML is a(71)language for documents containing(72)information.
Structured information contains both content(words, pictures, etc.)and some indication of what role that content plays(for example, content in a section heading has a different meaning from content in a footnote, which means something different than content in a figure caption or content in a database table, etc.). Almost all documents have some structure.
A markup language is a(73)to(74)structures in a document. The XML specification defines a standard way to add markup to(75).
A.make-up
B.madeup
C.markup
D.makeup
第2题:
第3题:
下列碳正离子稳定性顺序应是: ① PhCH2+ ② CH3─CH+─CH3 ③ Ph3C+ ④ Ph2CH+ (A) ③ > ④ > ① > ② (B) ④ > ③ > ① > ② (C) ③ > ④ > ② > ① (D) ① > ④ > ③ > ②
A.A
B.B
C.C
D.D
第4题:
《英国药典》()
A.Ch.P
B.BP
C.USP
D.JP
E.Ph.Eur.
《美国药典》()
A.Ch.P
B.BP
C.USP
D.JP
E.Ph.Eur.
《日本药局方》()
A.Ch.P
B.BP
C.USP
D.JP
E.Ph.Eur.
请帮忙给出每个问题的正确答案和分析,谢谢!
第5题:
下列属于硫醇的化合物有:
A.Ph-SH
B.CH3-SH
C.CH3-S-CH3
D.HSCH2CH2OH
E.CH3CH(SH)CH2CH2CH3