著名的崇圣寺三塔屹立在美丽的苍山与洱海之间（见下图）。这一遗迹是唐朝与哪一少数民族经济文化交流的见证
A．南诏
B．突厥
C．回纥
D．吐蕃
答案：A
It is the experience he had as a boy ______ has formed his present personality.
A．that
B．what
C．which
D．who
物体做平抛运动时，它的速度方向与水平方向的夹角α的正切tanα随时间t变化的图象是如图中的[ ]
A．
B．
C．
D．
