Use the following information for ECE incorporated: Assets $200 million Shareholder Equity $100 million Sales $300 million Net Income $15 million Interest Expense $2 million If ECE reported $15 million in net income, then ECE's Return on Equity (ROE) is: A: 5.0% B: 7.5% C: 10.0% D: 15.0%

In 1803 the United States purchased Louisiana from _____.

常用的检索系统有() A: ECE B: CLL C: SCI D: EI

In 1803, President Jefferson negotiated the purchase of Louisiana from Mexico.

世界上第一部《医学伦理学》于（ ）年出版。 A: 1801 B: 1802 C: 1803 D: 1804 E: 1805

Use the following information for ECE incorporated: Assets $200 million Shareholder Equity $100 million Sales $300 million Net Income $15 million Interest Expense $2 million If ECE reported $15 millio A: 5.0% B: 7.5% C: 10.0% D: 15.0%

若[img=73x25]1803e28eb67026f.png[/img]是线性齐次方程[img=114x26]1803e28ebe19037.png[/img]的解，[img=74x25]1803e28ec62c13f.png[/img]是[img=143x26]1803e28ece8312a.png[/img]的解，则[img=148x25]1803e28ed7417fd.png[/img]（[img=13x19]1803e28ee070d04.png[/img]为任意常数）是非齐次线性微分方程[img=143x26]1803e28ece8312a.png[/img]的解

唾液可以止血是因为唾液中有一种叫（）的活细胞 A: EAB B: ECF C: ECE

（）是日本的技术安全法规体系。 A: FMVSS B: ECE/EEC C: JIS/JASO D: GB

国际网球联合会成立于 A: 1903 B: 1803 C: 1913 D: 1923