【单选题】革龟是一种最大的海龟。当它们被人工饲养时,极易感染一种致命的丁病毒。但是,野生的革龟却不太容易感染这种病毒。据科学统计,人工饲养和野生革龟的平均寿命却并没有什么差别。由此可以得出结论,丁病毒引发的疾病,并不是造成野生革龟死亡的主要原因。为了使上述论证成立,以下哪项是必须假设的?
B.
γ病毒引发的疾病,是造成人工饲养革龟死亡的主要原因。
【单选题】热力学第二定律对于人类追溯自然史做出的贡献不包括:()
【单选题】党的十九大报告提出要推进绿色发展,加快建立绿色生产和消费的法律制度和政策导向,建立健全( )的经济体系。
【简答题】听力原文:New York is called the city that never sleeps, but one small company wants that to change. On the 24th floor of the landmark Empire State Building, is Metro Naps, a month-old company offering a s...
【简答题】Zhon Mei Feng's company wants her to learn to divide the market into groups,which it can target with different brands.
【单选题】What does the company expect Neville to do?
A.
The company wants him to be a forward looking person.
B.
The company wants him to change the logistics industry in Canada.
C.
The company wants Jenny Choi to take over from Neville.
D.
The company wants Neville to assist Ron Lindsay.
【单选题】党的十九大报告提出要推进绿色发展,加快建立绿色生产和消费的法律制度和政策导向,建立健全( )的经济体系。