题干
I will never forget the day ____ Shenzhou V was launched, ____ has a great effect on my life.
A：when; which
B：that; which
C：which; that
D：when; that
答案(点此获取答案解析）
A
＋
＝1的离心率为( )
x+1的图像与x轴、y轴分别交于点A、B，把Rt△AOB绕点A顺时针旋转角α（30°＜α＜180°），得到△AO′B′． 