猜想一：小球的落地点到球台的水平距离s可能与小球离开桌面的速度大小有关；

猜想二：小球的落地点到球台的水平距离s可能与桌子的高度H有关．

然后，小明选取了钢球并用高度可调的桌子与斜面组成如图所示的装置，并进行了实验，得到了部分数据如表．

某实验小组欲证明氧化铜能加快氯酸钾的分解，进行了如下实验：按表中的质量混合好固体后，在相同条件下加热，并与二氧化锰的催化效果做比较，实验均以生成50mL气体为准（见图甲）：

回答下列问题：

    Beijing was once a city of bikes, known as the Bicycle Kingdom____ cars were reserved for official business and the politically powerful. However, decades of economic____ (grow) led to a huge flowing of cars in the city. Owning one became not just a marker of reaching the middle class but also a requirement for marriage. As the economy developed, autos pushed bikes off the roads____ (create) heavy pollution and miserable traffic.

    ____(fortunate), now Beijing may he returning to its roots. Thanks to about 20 technology companies, brightly colored shared bikes ____(flood) into Beijing in the last two years. Many local residents welcome the shared bikes____the flexibility and freedom they offer. They pick up the bikes and then ride and drop____ off anywhere they like, locking the back wheel, with no need to find a fixed place.

    Analyses in China say it is three factors that contribute to bikes ____(increase) rapidly: a lot of cash looking for a home, a good idea and government support. “As the city s population grew, traffic jams got ____ (bad).” Cai, the Ofo spokeswoman, said, “Shared bikes could solve the 'last mile' problem in ____ environmentally friendly way.”

下列计算正确的是（　　）