气管和支气管内表面黏膜的纤毛摆动的意义是() A.使黏液均匀分布在黏膜表面 B.形成 发布时间:2018-05-30 08:18 │ 来源:www.tikuol.com 题型:单项选择题 问题: 气管和支气管内表面黏膜的纤毛摆动的意义是()A.使黏液均匀分布在黏膜表面B.形成唾液C.使气体通畅D.将细菌和灰尘推向喉部
题型:单项选择题 请从下面所给答案中选出适当的内容填空。Teacher: Hello, everyone. In spring, we can go outing (春游). Everyone: OK, 1 Teacher: Is there a path here? Wu Man: 2 Teacher: Is there a village over there? Liu Ying: Yes, there is. Wu Man: Is there a lake in the nature park? Liu Ying: Yes, 3 There is a river near here. Wu Man: 4 Li Ying: It's blue. Wu Man: Can you see it in the city? Li Ming: 5 A. Let's go to the city. B. What colour is the lake?C. I can't find the blue lake. D. No, there isn't.E. Let's go to the village. F. but it's very far.1. 2. 3. 4. 5. 查看答案
题型:单项选择题 甲、乙两图是物理学史上两个著名实验的示意图。 (1)甲图为探究________现象的实验电路。举一个应用此现象的实例:_______________。(2)乙图所示实验最早是由物理学家____________做的。如果将倒立在水银槽中的玻璃管稍微向上提一些,但管口不离开水银面,这时管内外水银面之间的高度差__________(选填“增大”、“不变”或“减小”)。 查看答案
题型:单项选择题 有关肿瘤的临床表现,下列哪项是不正确的()A.骨肿瘤的发现往往在损伤之后B.肿瘤近关节,活动功能将受限制C.局部肿胀是另一个重要症状D.疼痛剧烈持久时,需考虑肿瘤是恶性E.脊柱肿瘤可压迫脊髓而瘫痪 查看答案