Christmas is a wonderful time of the year. Have yourself a merry homemade holiday. Reindeer carrying Santa with carols (圣诞颂歌) filling the air. It is a time for Christmas ornaments (装饰), gift, and twinkling lights. Shopping, wrapping parts full of giving. Trees for parents, toys for children, and flowers for your lever. Miracle will be made with love and your own two hands. A festive occasion, along awaited day. So do not hesitate to join our special fair.
The ongoing Laitai Christmas Sale can be found on the third floor of the Laitai flower and plant market and will nm until December 26th.
Christmas trees, gorgeous candlesticks, delicate garlands and collection...you can find anything you want for the splendid holiday!
A design of decorative hoops for Christmas will be specially offered to hotels, halls and restaurants.
During the sale, anyone who has an invitation will get a small gift.
Laitai Christmas Sale
The place: the third floor of Laitai (1) market
Time: until (2)
Goods: 1) (3) , gorgeous candlesticks, delicate garlands and collection of ornaments and decorations
2) a design of decorative hoops specially offered to hotels, (4)
Good news: During the sale, anyone who has an invitation will get a (5)
4（）
先后射入电场中，最后分别打在正极板A、B、C 处，则：（ ） 
，说明
，由于三个粒子的偏转距离一样，因此
。说明A粒子应该带负电，C粒子应该带正电，B粒子不带电。同时从做功角度来看，电场力对A做正功，对C做负功，因此
，综上分析，C正确。