5.
填空题
\((1)\)计算:\({{\left( \sqrt{3}-2 \right)}^{0}}-{{\log }_{2}}\sqrt{2}=\_\_\_\_\_\_\_\_\).
\((2)\)一个几何体的三视图如图所示,则该几何体的体积为________.
\((3)\)已知\(P_{1}\),\(P_{2}\)分别为为直线,\(l_{1}\):\(x+3y-9=0\)和\(l_{2}\):\(x+3y+1=0\)上的动点,则\(|P_{1}P_{2}|\)的最小值是________.
\((4)\)狄利克雷是德国著名数学家,函数被称为狄利克雷函数\(.\)下面给出关于狄利克雷函数\(D(x)\)的五个结论:
\(①\)若\(x\)是无理数,则\(D(D(x))=0\);
\(②\)函数\(D(x)\)的值域是\([0\),\(1]\);
\(③\)函数\(D(x)\)是偶函数;
\(④\)若\(T\neq 0\)且\(T\)为有理数,则\(D(x+T)=D(x)\)对任意的\(x∈R\)恒成立;
\(⑤\)存在不同的三个点\(A(x_{1},D(x_{1}))\),\(B(x_{2},D(x_{2}))\),\(C(x_{3},D(x_{3}))\),使得\(\triangle ABC\)为等边三角形.
其中正确结论的序号是________.