2019年12月18日，连接青海格尔木与甘肃敦煌的敦格铁路全面建成通车。读敦格铁路示意图和敦煌莫高窟景观图，完成题目。
有关敦格铁路叙述正确的是（ ）
由图可知，敦格铁路是一条南北走向的铁路，故A错误。跨越了第一、第二阶梯，故B错误。连接了西北地区和青藏地区，故C错误。加强了新、藏两地的密切联系，故D正确。故选D。
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?
