【单选题】缺乏维生素B12和叶酸可引起的疾病是()
【简答题】在2008年国际金融危机的影响下,西方国家都出现了哪些问题?
【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. -________.
【单选题】To avoid pain in the deep brain stimulation, ___________________.
A.
general anesthesia is usually provided
B.
local anesthesia is usually provided
【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。