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        1. The position of a(n) is a part-time job. A. florist B. artist C. preschool teacher D. dental nurse 63 Which of the following is the most important for the childcare job? A. Cooking skills. B. Childcare experience. C. The ability to start work in two weeks. D. The ability to work well with other people. 查看更多

           

          題目列表(包括答案和解析)

          以下是用Scilab編寫的程序,輸出a,b的含義是________________.

          a=input(“please give the first number”)

          b=input(“please give the second number”)

          while a<>b

             if a>=b

              a=a-b;

             else

              b=b-a;

            end

          end

          print(%io(2),a,b)

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          以下是用Scilab編寫的程序,輸出a,b的含義是________________

          a=input(please give the first number)

          b=input(please give the second number)

          while a<>b

             if a=b

              a=ab;

             else

              b=ba;

            end

          end

          print(io(2),ab)

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          i是虛數(shù)單位,
          5i
          2-i
          =( 。
          A、1+2iB、-1-2i
          C、1-2iD、-1+2i

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          函數(shù)f(x)=-
          x
          ex
          (a<b<1),則( 。
          A、f(a)=f(b)
          B、f(a)<f(b)
          C、f(a)>f(b)
          D、f(a),f(b)大小關(guān)系不能確定

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          對(duì)于非零向量
          m
          n
          ,定義運(yùn)算“#”:
          m
          #
          n
          =|
          m
          |•|
          n
          |sinθ
          ,其中θ為
          m
          ,
          n
          的夾角.有兩兩不共線的三個(gè)向量
          a
          ,
          b
          c
          ,下列結(jié)論:
          ①若
          a
          #
          b
          =
          a
          #
          c
          ,則
          b
          =
          c
          ;②
          a
          #
          b
          =
          b
          #
          a
          ;
          ③若
          a
          #
          b
          =0
          ,則
          a
          b
          ;④(
          a
          +
          b
          )#
          c
          =
          a
          #
          c
          +
          b
          #
          c

          a
          #
          b
          =(-
          a
          )#
          b

          其中正確的個(gè)數(shù)有( 。
          A、1個(gè)B、2個(gè)C、3個(gè)D、4個(gè)

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