肺腺癌的临床特点中，下列错误的是（）
A.起源于支气管黏膜上皮，少数起源于大支气管的黏液腺
B.发病率比鳞癌和未分化癌低，发病年龄较小，女性多见
C.多数起源于较小的支气管，为周围型肺癌
D.淋巴转移发生早，血行转移发生晚
E.早期一般无明显临床症状，胸部X线检查时被发现
参考答案：D
解析：肺腺癌一般生长较慢，有时早期即发生血行转移，淋巴转移则发生较晚。
阅读下列短文，根据短文内容填写表格，每空限填一词。 Travelling is one of the most important activities and people have been interested in it for many years. Modern traffic develops fast, so travelling to different places has become much faster than before. Staying healthy while travelling can make your trip happier. But do you know how to keep healthy during a trip? The following information may be useful to you. Before leaving Wear comfortable shoes, a hat and sunglasses. Take some necessary medicine with you. They can be used when you get sick or have other problems. Do some exercise for weeks or months before you leave if you plan to do lots of walking or climbing during your trip. Prepare proper food. Before you prepare the food, the first thing you need to think about is how long you will travel with the food. If you take a long trip, you should bring food such as bread, biscuits and some fruit. They don’t go bad quickly. The nearer people can bring meat, fish, eggs, milk and even salads and vegetables. While travelling Be sure not to eat dirty food or bad fruit. Have enough time to take a rest during your trip. Tap water is not safe, so drink bottled water and always clean the cover of the bottle. Keep food in good condition. If you take hot food, you should try to keep it hot. For example, you can put it in heavy towels. If you need to keep cold food cold, you can put cold food in a box with ice. When you arrive, put cold food in the fridge. Remember: If you travel with food, keep hot food hot and cold food cold.
| ||||||||||||