问题
单项选择题
男，65岁。间断腹胀、上腹隐痛25年。胃镜检查提示：胃体黏膜变薄，血管透见，皱襞稀疏。患者可能缺乏的维生素是
A．维生素B4
B．维生素C
C．维生素B12
D．维生素B2
E．维生素D
答案
参考答案：C
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男，65岁。间断腹胀、上腹隐痛25年。胃镜检查提示：胃体黏膜变薄，血管透见，皱襞稀疏。患者可能缺乏的维生素是
A．维生素B4
B．维生素C
C．维生素B12
D．维生素B2
E．维生素D
参考答案：C
| 阅读理解。根据短文内容填空，每空一词。 |
| Now cities are full of cars. Some families even have two or three cars.Parking is a great problem. Something will have to be done to change it. What will the cars of tomorrow be like? Little cars may some day take the place of today's big cars. If everyone drives little cars in the future there will be less pollution in the air. There will also be more space for parking cars in cities, and the streets will be less crowded .Three little cars can fit (适合) in the space now needed for one car of the usual size. The little cars will cost much less to own and to drive. Driving will be safe, too. What is more,these little cars can go about 65 kilometers per hour (每小时). Little cars of the future will be fine for going around a city, but they will not be useful for long trips. If big cars are still used along with the little ones, two sets of roads will be needed in the future. Some roads will be used for the fast big cars , and other roads will be needed for the slow little ones. |
| 1. In cities , _____ is a big problem for those people who have cars. 2. In the _____ little cars will cost much less to own and to drive. 3. A little car's size of tomorrow may be _____ third of today's one car's usual size. 4. If people drive little cars _____ of the big ones,there will be less air pollution. 5. Two sets of roads will be built for the fast big cars and the _____ little ones. |