A:By bus.
B:By bike.
C:By car.
读某区域经纬网图(图1)和地球公转示意图(图2),完成下列问题.
To persuade drivers to ____checking their phones whenever they beep, the New York state plans to introduce so-called Texting Zones along its major highways to make sure of the drivers' safety.
已知F1,F2是双曲线x2a2-y2b2=1(a,b>0)的左、右焦点,过F1且垂直于x轴的直线与双曲线交于A,B两点,若△ABF2为钝角三角形,则该双曲线的离心率e的取值范围是( )
大于90°的角就是钝角.