Over one quarter of energy consumption for lighting could be saved by 2025 if___________．

A. people donated billions
B. hundreds of students got scholarships
C. hundreds of people put money into the fund
D. she was sent to university

A. There have been many attempts to redesign the periodic table since Dmitri Mendeleev drew it up in 1871．
B. Railsback has still ordered the elements according to the number of protons they have．
C. “I imagine this would be good for undergraduates．”
D. Railsback has listed some elements more than once．
E. And the size of element’s symbol reflects how much of it is found in the Earth’s crust．
F. The traditional periodic table was well drawn．

A. 学校的产生
B. 剩余产晶的出现
C. 国家的出现
D. 文字的产生

A. 持有现货的成本和时间价值全成本
B. 现货金融工具的收益率
C. 融资利率
D. 市净率