下列政权被蒙古族所灭的有(     )
①辽    ②西夏    ③南宋    ④北宋    ⑤金

如图所示为演示交变电流的装置图，关于这个实验，正确的说法是(  )

如图所示是蹦床运动员在空中表演的情景，在运动员从最低点开始反弹至即将与蹦床分离的过程中，下列说法中正确的是（   ）

下列各句中，没有语病的一句是(　　)

    Showing your feeling is important. It is a mistake not to talk to anyone1you're feeling sad, worried or nervous. If you keep bad feelings inside, it can even make you2.

    But if you  3 with someone，like your mom or dad or your best friend，you'll usually begin to feel 4 than before. Now you're not all alone with your problems or worries. 5，it doesn't mean your problems and worries will disappear magically(神奇地）.But at 6，someone else understands what's 7 with you and can help 8 find ways to solve your problems.

    Your mom and dad want to know if you have any 9.They love you and they want to know what's happening in your life. But if you don't want to talk with them，what should you do? Find a trustworthy(可信的)friend or teacher at school or a relative. Maybe that person can help you deal with your problems. Then you'll feel as 10as before.