问题
单项选择题 A型题
叶酸缺乏不会导致（）
A.巨幼红细胞性贫血
B.口腔生殖综合征
C.舌炎及胃肠功能紊乱
D.婴儿神经管畸形
E.高同型半胱氨酸血症
答案
参考答案：B
解析：考查叶酸缺乏症，口腔生殖综合征是维生素B缺乏的症状。
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叶酸缺乏不会导致（）
A.巨幼红细胞性贫血
B.口腔生殖综合征
C.舌炎及胃肠功能紊乱
D.婴儿神经管畸形
E.高同型半胱氨酸血症
参考答案：B
解析：考查叶酸缺乏症，口腔生殖综合征是维生素B缺乏的症状。
| 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. |