一个坡面在顺坡方向降水、入渗强度、坡面质地一致的情况下，不同坡段侵蚀量也不相同，该图表示侵蚀量在坡面上的变化。读图回答下列问题。

某电视台为了了解本地区电视节目的收视率情况，对部分观众开展了“你最喜爱的电视节目”的问卷调查（每人只填写一项），根据收集的数据绘制了下面两幅不完整的统计图．根据要求回答下列问题：

（1）本次问卷调查共调查了多少名观众？

（2）补全图1中的条形统计图；并求出图2中收看“综艺节目”的人数占调查总人数的百分比；

（3）求出图2中“科普节目”在扇形图中所对应的圆心角的度数；

（4）现有喜欢“新闻节目”（记为A）、“体育节目”（记为B）、“综艺节目”（记为C）、“科普节目”（记为D）的观众各一名，电视台要从四人中随机抽取两人参加联谊活动，请用“列表法”或“画树形图”的方法求出恰好抽到喜欢“新闻节目”和“体育节目”两位观众的概率．

通读下面短文，掌握其大意，然后在各小题所给的四个选项中，选出一个最佳答案。

     Some inventions are very important. For example, the telephone allows people to communicate all over the world. The 1 lets people travel long distances in a short time. Life is much easier with these 2inventions.

     Some inventions are just fun. A company in Japan has invented3 flowers. You can listen to music that comes through real flowers. Customers in restaurants can smell the beautiful roses 4listen to pleasant music while eating. People in the dentist's office can look at pretty lilies and listen to Mozart while having their 5examined!

     There is now a vehicle that gets you around with almost no effort 6. In fact, you drive this invention while standing on it ! This vehicle runs by electricity. It 7 quite easily. When you lean forward, it moves forward, and when you lean 8, it moves backward!

     A new kind of bubble(气泡) liquid（液）has been invented. If you blow bubbles 9 this liquid, they can last for several minutes! 10 are very strong. You can even pick them up and throw them around!

     Do you have your own ideas about inventions now?