题目

WHERE ARE WE GOING TODAY?The Play Indoor Playground covers 2, 300 square feet. It has fun, colorful entertaining and exciting toys and equipment for you to play with.How about the inflatable（可充气的） obstacle course？ Do you think you will be able to walk around it as you re bouncing everywhere? Maybe you want to take a swim in the ball pool.The great thing about playing is being able to be creative and use your imagination. You can be ANYTHING you want to be! How about being monkeys to hide out in the tree house? You can climb up to the top of the tree house slide, and pretend to ea把长为10cm左右的饮料吸管A插在盛水的杯子中，另一根吸管B的管口贴靠在A管的上端，往B管中轻轻吹气，如图所示，可以看到的现象是    ，这是因为    ．