单项选择题

What is the main topic of the conversation

A．The development of the automobile.
B．Declining air quality.
C．The structure of nitrous oxides.
D．Air quality management.
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单项选择题
Which of the following statements about the symbols is INCORRECT
A．Both are used as the organization’’s official symbols.
B．Both are used regardless of religious significance.
C．The red cross was the organization’’s original symbol.
D．The red crescent was later adopted for use in certain regions.
单项选择题
Which of the following concerning the document is NOT true
A．The document will cover the next two decades.
B．The document will win support from the delegates.
C．The document will serve as a guideline.
D．The document will be completed after the conference.
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