引起Ⅰ型呼吸衰竭最常见的疾病是（） A.慢性支气管炎 B.阻塞性肺气肿 C.气管异物 发布时间：2017-08-16 22:21 │ 来源：www.tikuol.com 题型：单项选择题 问题： 引起Ⅰ型呼吸衰竭最常见的疾病是（）A.慢性支气管炎B.阻塞性肺气肿C.气管异物D.膈肌麻痹E.ARDS
题型：单项选择题 Artificial flowers are used for scientific as Well as for decorative purposes. They are made from (51) of materials, such as wax and glass, so skillfully that they can scarcely be (52) from natural flowers. In making such models, painstaking skill and artistry are called for, (53) thorough knowledge of plant structure. The (54) of glass flowers in the Botanical Museum of Harvard University is the most famous in North America and is widely known (55) the scientific world. (56) , there are several thousand models in colored glass, the work of two artist naturalists, Leopold Blalschka and his son Rudolph. The intention was to have the collection (57) at least one member of each flower family native to the United States. (58) it was never completed, it contains more than seven hundred species representing 164 families of flowering plants. (59) detail of these is accurately reproduced in color and structure. The models are (60) n locked cases as they are too valuable and fragile for classroom use.A．After allB．For allC．Above allD．In all 查看答案
题型：单项选择题 下列关于测量标志的规定中描述正确的是，（）A.国家三、四等点测量标志由设区的市和县级测绘管理部门负责统一管理和保护B.省级基础控制网点测量标志由测量标志所在地的县级测绘管理部门负责统一管理和保护C.工程建设应当避开永久性测量标志D.经批准迁建的永久性测量标志，工程建设单位应当承担迁建所需的费用 查看答案