【单选题】导致我国股市与经济走势异动的重要原因之一是
【简答题】如图,在直角坐标系中,直线y= x+4与x轴、y轴分别交于A. B两点,过点A作CA⊥AB,CA= ,并且作CD⊥x轴 (1)求证:△ADC∽△BOA; (2)若抛物线y= -x 2 +bx+c 经过B、C两点 ①求抛物线的解析式; ②该抛物线的顶点为P,M是坐标轴上的一个点,若直线PM与y轴的夹角为30°,请直接写出点M的坐标。
【简答题】当视频素材不能以正常帧速率播放时,时间轴面板的时间标尺处将出现提示。A. 红色
【简答题】已知点 ,动点 、 分别在 、 轴上运动,满足 , 为动点,并且满足 . (Ⅰ)求点 的轨迹 的方程; (Ⅱ)过点 的直线 (不与 轴垂直)与曲线 交于 两点,设点 , 与 的夹角为 ,求证: .
【单选题】It is important to dress right for an interview because that critical first impression is all you will be able to give. ___________. While image is not everything, it is important.
A.
Look for and buy clothes that are durable and dependable
B.
Most interviews last less than 20 minutes
C.
Be careful not to use slang expressions
D.
One key is to wear clothes to the interview that reflect the job you want
【简答题】已知双曲线C的实半轴长与虚半轴的乘积为 3 ,C的两个焦点分别为F 1 ,F 2 ,直线l过F 2 且与直线F 1 F 2 的夹角为tanψ= 21 2 ,l与线段F 1 F 2 的垂直平分线的交点是P,线段PF 2 与双曲线C的交点为Q,且|PQ|:|QF 2 |=2:1.求双曲线C的方程.
【单选题】What makes interviewers want to escape from the interview?
A.
The flatter on their image from interviewees makes them uncomfortable.
B.
The interviewees rub people up the wrong way as Mark Zuckerberg-type genius.
C.
They cannot find the most important quality of fit in the interview.
D.
The tedious and routine way to recruit people makes them frustrated.
【判断题】过点 且与 轴, 轴, 轴的夹角分别为 的直线的对称式方程是 。( )
【单选题】What does the prefix “Penta-” mean?