Thomas Edison spent years on his monumental inventions which brought light to human being. The underlined part means______.
A．historical
B．historic
C．sentimental
D．archaic
请帮忙给出正确答案和分析，谢谢！
关于核酸正确的叙述是
A、核酸的基本组成单位是核苷的磷酸脂
B、基本成分是磷酸、碱基和脱氧核糖
C、DNA无胸腺嘧啶和核糖
D、RNA无核糖和尿嘧啶
E、DNA和RNA的结构和功能都不同，但存在部位相同
请帮忙给出正确答案和分析，谢谢！
What can we know from the incident in Paragraph Four？
A．Dave Bing cancelled the construction of the statue due to budget problems.
B．Detroit"s financial situation has been largely improved.
C．Dave Bing responded too emotionally toward the project plan.
D．Whether cancelling the statue project is right or wrong is open to debate.
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下列不属于病例发现途径的是
A、因症就诊或转诊检查
B、可疑者检查
C、一般人群筛查
D、高发病人群检查
E、重点行业对象检查
请帮忙给出正确答案和分析，谢谢！
Which of the following is TRUE according to the first paragraph？
A．It is human nature displaying contempt for someone who is defeated.
B．Detroit"s bankruptcy represents the decline of U. S. automobile industry.
C．Rise and fall is a natural law from which no one can escape.
D．Other Rust Belt cities are suffering similar dilemmas as Detroit is.
请帮忙给出正确答案和分析，谢谢！
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