2017年5月5日，在中国国际展览中心将展出橄榄核雕、菩提、南红、书画、青金、松石、红木、折扇、核桃、沉香、精品瓷器等丰富的文玩艺术，让人们感受到橄榄核雕的魅力。这表明（    ）

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    The following are the top things to do in Tampa Bay on the weekend.

    Santa and Ice Skating in St. Petersburg: After visiting Santa, go skating on a simulated (模拟的) ice place. 6:00 pm, North Straub Park, Fifth Avenue NE and Bayshore Drive, St. Petersburg. Free; $5 skating.(727) 893-7441.
    Christmas in the Wild: The animals come out at night for the zoo's new holiday party with carolers (唱圣歌者), performers, a Christmas tree, holiday foods, music and chances with Santa. 9:30 am, Lowry Park Zoo, 1101 W Sligh Ave., Tampa. $ 27. 95 seniors, $22. 95 aged 3—11, 2 and younger free. (813) 935-8552.
    Rudolph the Red Nosed Reindeer: The use of puppets (木偶) improves the attraction of this live version of the 1964 television classic. 3:00 pm, Ruth Eckerd Hall, 1111 N McMullen-Booth Road, Clearwater. $35—$ 100. (727) 791-7400.
    An American in Paris: The Tony Award-winning musical is about an American soldier, a secret French girl and a European city in the consequence of war. Through Dec. 25. 7:30 pm, Carol Morsani Hall at the Straz Center for the Performing Arts, 1010 N MacInnes Place, Tampa. $ 39— $ 90. (813) 229-7827.
    It's A Wonderful Life: A Live Radio Play: An ensemble (重唱) brings a few dozen characters to life with live, on-stage sound effects, to present the story of George Bailey, who considers taking his own life on Christmas Eve. 8:00 pm, American Stage Theatre Company at Raymond James Theater, 163 Third St. N, St. Petersburg. $ 30. (727) 823-7529.

在△ABC中，a、b、c分别是角A、B、C的对边，若a²+b²=2016c²，则 $\frac{tanA\cdot tanB}{tanC\left(tanA+tanB\right)}$ =____．

No one knows how the huge rocks _______ and _______ without our modern machines eight hundred years ago.