微波炉工作时，消耗电能，产生微波，电能属于____（填“一次”或“二次”）能源，微波____（填“是”或“不是”）电磁波．

纳米二氧化钛（化学式为TiO₂）是较为理想的光催化材料，该物质在日光或灯光中紫外线的作用下，可催化、光解甲醛等有机物，净化室内空气，下列说法正确的是（   ）

甲、乙两种固体的溶解度曲线如图所示．下列说法中，正确的是（    ）

阅读理解

    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.

阅读理解

    It is Sunday today. Anna goes shopping with her mother. She wants her mother to buy a new coat for her. In Hongxing Shop, she finds a green coat. She tries it on. It's too small. She wants a big one, but the big one is not green. Anna doesn't like other colors.” Let's go to another(另外的)  shop to have a look.”her mother says. Then they go to Jiajiale Shop. The shop is big and they see many kinds of coats in different colors and sizes(尺码). Anna tries on a green one. It looks nice on her. So they take it for forty-five yuan.