读“我国大兴安岭及其两侧自然地理环境剖面示意图”，完成题目。
乙地生产的稻米因品质优良，近年来水稻种植面积逐年扩大，打破了传统的“南稻北麦”格局，该地稻米品质优良的主要原因是（ ）
东北平原主要位于我国的中温带和寒温带，热量条件较差，水稻生长周期长，积累的营养成分多，品质优良，A正确。东北平原水源充足，灌溉便利，对稻米品质不是主要影响，B错误。东北地区属于温带季风气候，降水偏少，C错误。生产技术不是稻米品质优良的主要原因，D错误。故选A。
Dogs are the best pets of humans. They come in all sizes. Some dogs are as small as a football, and others are as tall as a desk. Dogs’ fur (毛) is different, too. It can be long and soft, or smooth and hard. People don’t mind the kind of fur, because all dogs are good to hug.
请在字典中查一下这个词。
我喜欢甜食， 你知道的。
去年， 彼得在旅途中和许多人交了朋友。
我叫托尼· 史密斯， 史密斯是我的姓。
我们在课上回答问题时应该起立
Tea and coffee are two of the most popular drinks in the world. However, people usually like one more than the other. These drinks also have very different uses.
People in the office usually sit for most of the day when they work. But this is bad for a person’s health. When people sit for too long every day, they don’t move very much. So it is easy to start getting fat. Sitting too long is also bad for their work because it makes them want to sleep. When this happens, people may make more mistakes in their work or spend more time finishing their work. Companies need workers to be healthy, so how do they fix the problem?
