1编号:3113题型:解答题测试正确率:75.73%
(2010年浙江省东阳县)如图,P为正方形ABCD的对称中心,A(0,3),B(1,0),直线OP交AB于N,DC于M,点H从原点O出发沿x轴的正半轴方向以1个单位每秒速度运动,同时,点R从O出发沿OM方向以个单位每秒速度运动,运动时间为t。求:(1)C的坐标为;(2)当t为何值时,△ANO与△DMR相似?(3)△HCR面积S与t的函数关系式;并求以A、B、C、R为顶点的四边形是梯形时t的值及S的最大值。
2编号:3080题型:单选题测试正确率:62.15%
I don't know if he ______ you. If he ______ much time at that moment, he will.
3编号:3079题型:单选题测试正确率:61.74%
How ______ this accident______?
4编号:3073题型:单选题测试正确率:71.79%
Cathy is taking notes of the grammatical rules in class at Sunshin School, where she ______ English for a year.
5编号:3072题型:单选题测试正确率:56.28%
The Greens ______ China for five years.
6编号:3071题型:单选题测试正确率:70.92%
The boy ______ English on the radio when I ______ his door.
7编号:3070题型:单选题测试正确率:60.93%
He ______ his leg when he ______ in a football match.
8编号:3069题型:单选题测试正确率:69.03%
She ______Charles for a year.
9编号:3058题型:单选题测试正确率:65.06%
如图,在平面直角坐标系中,函数(x>0,常数k>0)的图象经过点A(1,2),B(m,n)(m>1),过点B作y轴的垂线,垂足为C,若△ABC面积为2,点B的坐标为()
10编号:3061题型:单选题测试正确率:45.95%
I'm gald to tell you that we______the work in less time than we______expected to.
提醒: