在所有的管理会计工具中，最具代表性的平台工具是()。
The authors discussion of the "mechanism that provides blood tryptophan to the brain cells"(lines 44-45)is meant to
A. stimulate further research studies.
B. summarize an area of scientific investigation.
C. help explain why a particular research finding was obtained.
D. provide supporting evidence for a controversial scientific theory.
E. refute the conclusions of a previously mentioned research study.
Which of the following statements is supported by information stated in the passage？
A. Japanese and United States automakers differ in their approach to production processes.
B. Japanese automakers have perfected the use of single-function equipment.
C. Japanese automakers invest more capital per employee than do United States automakers.
D. United States-owned factories abroad have higher production levels than do Japanese owned plants in the United States.
E. Japanese automakers have benefited from the cultural heritage of their workers.
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