单项选择题

Which of the following statements best explains why "the second of these was the more serious impediment" (Underlined )

A．Chemical knowledge was limited to a small number of people.
B．The symbolic language used was very imprecise.
C．Very few new discoveries were made by alchemists.
D．The records of the chemical processes were not based in experiments.

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单项选择题What is the passage mainly about

A．The scientific revolution in the seventeenth century.
B．Reasons that chemistry developed slowly as a science.
C．The practical aspects of chemistry.
D．Difficulties of organizing chemical knowledge systematically.

单项选择题According to the passage, how did knowledge about chemical processes increase before the seventeenth century

A．Philosophers devised theories about chemical properties.
B．A special symbolic language was developed.
C．Experience led workers to revise their techniques.
D．Experts shared their discoveries with the public.

单项选择题The bold word it refers to which of the following

A．Problem.
B．Material.
C．Difficulty,
D．System.

单项选择题This passage is most probably ______.

A．a review or Milton's Paradise Lost
B．an introduction of what Paradise Lost is about
C．a depiction of the cruelness of the British ruler
D．part of an introduction to English literature

单项选择题According to this passage, Paradise Lost is written for the purpose of ______.

A．praising God for the creation of the world
B．criticizing the cruelness of British ruler
C．changing people's unfavorable impression of Satan
D．expressing his support for the fight of Satan