• 2021-04-14
    【单选题】平面 2x+3y-3z=1 在x轴,y轴,z轴的截距分别为
    A. -1/2 -1/3 -1/3 B. 1/2 1/3 1/3 C. 1/2 -1/3 -1/3 D. 1/2 1/3 -1/3
  • 1/2 1/3 -1/3

    内容

    • 0

      已知点()(()-()1(),()y()1())(),()(2(),()y()2())(),()(()-()3(),()y()3())()都在函数()y()=()x()2()的图象上,则()()A.()y()1()<()y()2()<()y()3()B.()y()1()<()y()3()<()y()2()C.()y()3()<()y()2()<()y()1()D.()y()2()<()y()1()<()y()3

    • 1

      设A={1, 2, 3},B={1, 2, 3, 4},A到B的关系R={〈x, y〉|x=y},则R为 ( ) A: {<1, 2>, <2, 3>} B: {<1, 1>, <1, 2>, <1, 3>, <1, 4>, <1, 5>} C: {<1, 1>, <2, 1>} D: {<1, 1>, <2, 2>, <3, 3 >}

    • 2

      已知int x=1,y=2,z=3;以下语句执行后x,y,z的值是( ). if(x>y) z=x; x=y; y=z; A: x=1, y=2, z=3 B: x=2, y=3, z=3 C: x=2, y=3, z=1 D: x=2, y=3, z=2

    • 3

      如果,其中xyz≠0,那么x:y:z= A: 1:2:3 B: 2:3:4 C: 2:3:1 D: 3:2:1

    • 4

      填写执行结果:dict1={"x":1,"y":2,"z":3}dict1.popitem() A: {"x":1} B: {"x":1,"y":2} C: {"z":3"}