今年，株洲某网站随机抽取了540名中小学生，进行上网情况调查，结果如下表。请你对表中提供的信息进行比较分析，写出你得出的结论。

原子在失去最外层电子或最外层得到电子后不发生变化的是（　　）

①原子的质子数；②化学性质；③相对原子质量；④微粒的电性；⑤原子核；⑥电子层数；⑦最外层电子数；⑧核外电子数．

    Having a pet dog at home can be beneficial in many ways. It can teach you the value of responsibility, companionship, and caring for something other than yourself. Owning a pet dog is not just a temporary thing____You should care for your pet dog properly so you do not neglect it and help your parents train the pet dog so it is well behaved. You should also make sure you deal with any issues your pet dog is having responsibly so you do not harm your pet dog in any way.

    ____You should start by providing the necessities for your pet dog, including food and fresh water. Your parents may already have a feeding schedule set up, with set times in the day for feeding your pet dog. You should follow this feeding schedule and ask your parents if you can help it with giving your pet dog food and water on a daily basis.

    Clean up after the pet dog. You can also be a good pet owner by making sure you clean up after your dog. This means picking up any food that falls out of its food bowl and wiping up any water around its water dish so its feeding area is clean.____

    Take your pet dog for daily walks.____ You should create a walking schedule with your parents and assist your parents in walking your pet dog. You may put the collar or harness on the dog and take a tarn holding the leash during the walk, with the supervision of a parent.

    Play with your pet dog. You should spend at least ten to fifteen minutes a day playing with your pet dog so that it feels loved and acknowledged by you____

A. Give food and water to the pet dog.

B. Train your pet dog with simple orders.

C. It is a permanent responsibility that you must care for on a daily basis.

D. Never ever try playing jokes on your pet dog, because it will get hurt easily.

E. You should also use encouraging words and reward it with a treat if it behaves well when playing.

F. You can also pick up any pet toys and put them in one area so that they are not scattered all over house.

G. M you have a pet dog that is medium to large in size, you will need to walk it on a daily basis.

    The meanings of colors play an important ____in our world. What a color pass to a person of the west, may be very ____to someone in the east. While a bride(新娘) may wear white to her wedding (婚礼) in Europe or America, a bride ____China may choose to wear a traditional red dress.

Here are some ____and what they represent (代表，象征) to various people of the world.

    RED

    In China red is a ____of luck and is used for many celebrations such as wedding and at the beginning of the New Year. In the United States red represents love and is used during Christmas and so on. Red is also represents ____and power in the west.

    BLUE

    People around the world think____and the sky with the color blue. For this reason, blue is widely ____with peace and calm. But to the Cherokees (切罗基族人), blue meant trouble or failure. In the United States we have come to connect the color blue with sadness.

    GREEN

    In Paris, all garage collectors are clothed in green, drive green trucks and the bins are also green. In many parts of the world,____ has become a symbol of kindness and the earth.

    YELLOW

    Yellow is a color that symbolizes the sun. In the United States, school buses and taxis are often yellow____they can catch the eyes. But to the Egyptians, yellow was a color of mourning (哀悼).