阅读资料，回答问题．

最近，季节更替，气候变暖“诺如病毒”也进入高发期，本学期开学以来，多所学 校 （幼儿园）相继发生诺如病毒感染性腹泻暴发疫情，严重影响了师生身体健康和教学 秩序，给学校安全管理带来了巨大挑战．诺如病毒感染性腹泻是由诺如病毒引起的腹泻，是引起非细菌性腹泻暴发的主要病因，具有发病急、传播速度快、涉及范围广等特点．常 在社区、学校、餐馆、医院、托儿所、孤老院等处引起集体暴发．

如图，直线AB、CD相交于点O，OA平分∠EOC，∠EOC=70°，则∠BOD的度数等于（　　）

    Tea is an important part of Chinese tradition. The practice of drinking tea has____long history in China, having originated there. Nowadays, Chinese tea generally represents tea leaves which have been processed ____(use) methods inherited from ancient China.

    According to popular legend, tea____(discover) by Chinese Emperor Shen Nong in 2737 BC____a leaf from a nearby shrub fell into the water the emperor was boiling. The Emperor was interested in the new liquid,____ (drink) some carefully, and found it very refreshing. And so, tea was said to be created in 2737 BC.

    Tea is deeply woven into the history and culture of China. The beverage(饮料) is considered one of the seven____(necessity) of Chinese life, along with firewood, rice, oil, salt, soy sauce and vinegar. Around 771 BC—476 BC the Chinese tea was used ____(help) treat some diseases.

    Most Chinese teas are cultivated and consumed in China. Tea shops and tea houses in the street are easily found in China. Meanwhile, they are also exported internationally due____ a rise in the____(popular) of Chinese cuisine worldwide. Tea has become one of Chinese specific drinks in the world. It is ____(common) available in Chinese restaurants and grocery shops world wide.

我们判断是非的依据是法律和尊严。（   ）