private async void Animation3() //冒气泡的动画,用于回答何时收集的问题之后
        {
            Bubble.Visibility = Visibility.Visible;
            BubbleUp.Begin();
            await Task.Delay(3000);

            QuestionArea.InitWithQuestion();
        }
        /*
         * private void test()
         * {
         *  MessageDialog d = new MessageDialog("aha");
         *  d.ShowAsync();
         * }
         */



        private async void Animation1() //旋转试管的动画,用于回答试管问题之后
        {
            TubeAni.Begin();
            RubberAni.Begin();
            PipeAni.Begin();
            KMnO4.Visibility = Visibility.Visible;
            await Task.Delay(1000);

            TubeAni.Completed += (s, e1) => QuestionArea.InitWithQuestion();
        }
        private async void Animation2() //移动瓶子的动画,用于回答预热的问题之后
        {
            Flame.Visibility = Visibility.Visible;
            await Task.Delay(2000);

            JarAni.Begin();
            WaterAni.Begin();
            await Task.Delay(2000);

            WaterAni.Completed += (s, e1) => QuestionArea.InitWithQuestion();
        }