【简答题】已知抛物线 及点 ,直线 的斜率为1且不过点P,与抛物线交于A,B两点。 (1) 求直线 在 轴上截距的取值范围; (2) 若AP,BP分别与抛物线交于另一点C,D,证明:AD、BC交于定点。
【单选题】"大多数企业都进行了体制改革"判断形式是:
【单选题】That is, until 2012, when Drs. Edith Widder , Steve O’Shea and Tsunemi Kobodera filmed the elusive and mysterious giant in its natural deep-sea habitat for the first time ... (Para. 3)
A.
It was not until 2012 that Drs. Edith Widder , Steve O’Shea and Tsunemi Kobodera filmed the elusive and mysterious giant in its natural deep-sea habitat for the first time …
B.
We knew very little about the elusive and mysterious giant until 2012, when Drs. Edith Widder , Steve O’Shea and Tsunemi Kobodera filmed it in its natural deep-sea habitat for the first time …
【单选题】已知任意直线经过一点坐标及直线斜率,可列( )方程。
【判断题】7在国家法定节假日和学校寒暑假期间,博物馆可以闭馆。
【单选题】以下哪一项不是常见的计算机自动激发病毒的方式?()