【简答题】已知点p(x,y)是圆x 2 +y 2 -2y=0的动点,则3x+4y的最大值______.
【单选题】宗白华认为中国美学史上有两种不同的美感类型,“错彩镂金”和“()”。
【简答题】.已知点P是圆C:x 2 +y 2 +4x+ay-5=0上任意一点,P点关于直线2x+y-1=0的对称点在圆上,则实数a等于________.
【单选题】BB003 pH 值大于( )后,pH值增大,造浆率也提髙
【判断题】在任一输入0输入下,"与非"运算的结果是逻辑0。
【单选题】The project life-cycle can be described as(72).
A.
project concept,project plannin9,project execution,and project close-out
B.
project planning,work authorization,and project reporting
C.
project planning,project control,project definition,WBS development,and project termination
D.
project concept,project execution,and project reporting
【简答题】已知点P(1,4)在圆C:x 2 +y 2 +2ax-4y+b=0上,点P关于直线x+y-3=0的对称点也在圆C上,则a=______,b=______.
【单选题】BB003 pH值大于( )后,pH值增大,造浆率也提高
【简答题】点P在圆x 2 +y 2 -8x-4y+11=0上,点Q在圆x 2 +y 2 +4x+2y-1=0上,则|PQ|的最小值是_____.
【简答题】Logistics is the process of plannin9,implementing and controlling the efficient,effective flow and storage of( )from point of origin to the point of consumption for the purpose of conforming to custom...