已知全集$U=R,A=\left\{\overline{)x}x\le 0\right\},B=\left\{\overline{)x}x\ge 1\right\}$，则集合$C_U\left(A\cup B\right)$=

$\left\{\overline{)x}x\ge 0\right\}$ $\left\{\overline{)x}x\le 1\right\}$ $\left\{\overline{)x}0\le x\le 1\right\}$ $\left\{\overline{)x}<0x<1\right\}$