军考类
单选题圆x2+y2-2x+2y=0的周长是( ).
填空题已知直线l的倾斜角α满足3sin α=cosα,且它在x轴上的截距为2,则直线l的方程是____.
单选题已知a为任意实数,则直线(a-1)x-y+2a+1=0一定经过点( ).
填空题直线x-2y+5=0与圆x2+y2=8相交于A、B两点,则|AB|=____.
填空题圆x2+y2-4x=0的圆心坐标为____,半径为____.
单选题直线2x+y+2=0关于x轴对称的直线的方程是( ).
单选题We must find a way to cut prices _____ reducing our profits too much.
单选题This problem is _____ his ability and I don’t think he can solve it.
单选题It is reasonable for people to pursue a career in fields related _____ their favorite hobbies.
填空题若直线 与圆x2+y2=2相交于A、B两点(a,b∈R),且△AOB是直角三角形(O是坐标原点),则点P(a,b)与点(0,1)之间距离的最大值是____.
填空题一条光线沿直线2x-y+2=0入射到直线x+y-5=0上后反射,则反射光线所在的直线方程为____.
单选题圆心为(1,-2),半径为 的圆在x轴上截得的弦长为( ).
填空题若圆C的圆心与点P(-2,1)关于直线y=x+1对称,直线3x+4y-11=0与圆C相交于A、B两点,且|AB|=6,则圆C的方程为____.
填空题圆x2+y2+2x-8y+8=0的半径为____.
填空题点M在圆x2+(y-r)2=r2上,以∠MOx= 为参数,则圆的参数方程为____.
单选题The engine gives _____ smoke and steam.
单选题The sales representative from Correct Copies, Ltd, returned Mr. Yoshida’s call while he was _____.
单选题The train leaves at 6:00 p. m., so I have to be at the station _____ 5:00 p. m. at the latest.
填空题直线f经过点P(2,-1),且它在y轴上的截距等于它在x轴上截距的2倍,则l的方程是____.
单选题与点P(-1,2)距离为 的直线方程是( ).
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