8编号:30054题型:解答题测试正确率:60.92%
A:Good afternoon, Tom. Where are you going?
B:1_____________
A:Oh, to buy books? You are out! Why not go to the Readers' Room?
B:The Readers' Room?2_____________
A:It is a place where students can exchange their old books with others.
B:That sounds great!3_____________
A:It's next to Renmin Hospital, across from City Park.
B:Oh, it's a little far.4_____________
A:You can take No. 7 bus.
B:How long does it take?
A:5_____________
B:Ten minutes isn't a long time. OK, I will go there. Thanks!
9编号:30006题型:解答题测试正确率:0%
如图,已知一次函数y=-x+7与正比例函数y=x的图象交于点A,且与x轴交于点B.过点A作AC⊥y轴于点C,过点B作直线l∥y轴.动点P从点O出发,以每秒1个单位长的速度,沿O→C→A的路线向点A运动,同时直线l从点B出发,以相同速度向左平移,在平移过程中,直线l交x轴于点R,交线段BA或线段AO于点Q.当点P到达点A时,点P和直线l都停止运动.在运动过程中,设动点P的运动时间为t(秒).
(1)求点A和点B的坐标.
(2)当t为何值时,以A,P,R为顶点的三角形的面积为8?
(3)是否存在以A,P,Q为顶点的三角形是等腰三角形?若存在,求出t的值;若不存在,请说明理由.
10编号:30005题型:解答题测试正确率:0%