10.
如图,\(ABCD-A_{1}B_{1}C_{1}D_{1}\)为正方体,下面结论中正确的是____________\(.(\)把你认为正确的结论都填上\()\)
\(①BD/\!/\)平面\(CB_{1}D_{1}\);
\(②AC_{1}⊥\)平面\(CB_{1}D_{1}\);
\(③AC_{1}\)与底面\(ABCD\)所成角的正切值是;
\(④\)二面角\(C-B_{1}D_{1}-C_{1}\)的正切值是;
\(⑤\)过点\(A_{1}\)与异面直线\(AD\)与\(CB_{1}\)成\(70^{\circ}\)角的直线有\(2\)条.