【简答题】When there is a muster for an emergency there are several things that must be closed. Give three examples
【判断题】悉尼是澳大利亚最具有欧洲韵味的城市,被称为“澳大利亚的伦敦”。P339
【单选题】What problems can be observed when there are original thinkers in the workforce?
A.
They may have a negative effect on other workers.
B.
They dislike the concept of teamwork.
C.
They rush tasks through to completion.
D.
They cannot work with less creative colleagues.
【简答题】在平面直角坐标系xOy中,设F 1 (-4,0),F 2 (4,0),方程 x 2 25 + y 2 9 =1 的曲线为C,关于曲线C有下列命题: ①曲线C是以F 1 、F 2 为焦点的椭圆的一部分; ②曲线C关于x轴、y轴、坐标原点O对称; ③若P是上任意一点,则PF 1 +PF 2 ≤10; ④若P是上任意一点,则PF 1 +PF 2 ≥10; ⑤曲线C围成图形的面积为30. 其中真命题的序号...