【单选题】pain in the brain: ( )
【单选题】缺乏维生素B12和叶酸可引起的疾病是()
【单选题】为了预防和减少饭店行业突发事件的发生,我国旅游饭店协会制定了( )。
【简答题】The area is one of the best in Europe for finding ______ .
【单选题】-I’m leaving for Europe on vacation tomorrow. -________.
【简答题】A.Danish men are the best husbands in Europe. B.British and Italian men are not truthful. C.Housework is endless and tiredsome. D.European women are still doing most of the housework at home.
【单选题】The best title for the passage is
A.
Worries of European Drivers.
B.
Europe Discourages Drivers.
C.
Contrast of European and American Drivers.
D.
American Cities' Efforts to Ban Cars.
【简答题】, , 为常数,离心率为 的双曲线 : 上的动点 到两焦点的距离之和的最小值为 ,抛物线 : 的焦点与双曲线 的一顶点重合。(Ⅰ)求抛物线 的方程;(Ⅱ)过直线 : ( 为负常数)上任意一点 向抛物线 引两条切线,切点分别为 、 ,坐标原点 恒在以 为直径的圆内,求实数 的取值范围。