混凝土施工包括哪些工序？各工序对混凝土的质量有何影响？ 发布时间：2019-10-09 17:44 │ 来源：www.tikuol.com 题型：问答题 简答题 问题： 混凝土施工包括哪些工序？各工序对混凝土的质量有何影响？
题型：问答题 简答题 人们的衣、食、住、行中蕴含着丰富的化学知识。下列说法不正确的是 【 】A．衣料中的棉、羊毛等不属于合成有机高分子材料B．食用加碘食盐和强化铁酱油可补充某些人体必需微量元素C．建高楼大厦用到的钢和生铁属于铁的两种单质D．机动车辆用天然气代替汽油作燃料可减少空气污染 查看答案
题型：问答题 简答题 完形填空。 Traveling is fun because you can see how people in other parts of the world live. One thing travelersdon't often think about before 1 is how other cultures bathe. And bathrooms in many countries may be 2 from the kind you are used to. In the United States, most people take a 3 once a day in the morning. The showerhead is usuallymounted (镶嵌) on the 4 and cannot be moved. The bather slimpy 5 under the water, gets wet,scrubs (擦洗) with soap and often wash cloth, and then rinses (冲洗) off. 6 often take a bath each night and enjoy playing with small toys such as boats and rubber ducks.Many adults, especially women, enjoy a soothing (让人宽心的) bath 7 rid of stress at the end of the day. 8 is important to remember that when you take a shower or bath in the United States, you shouldbe careful to keep the water inside the bathtub or shower. Unlike bathrooms in many countries, there isno drain (排水管) in the floor. 9 water gets on the floor, it cannot go anywhere and must be 10 up with a towel or mop (拖把). It can also cause problems for the floor. So be careful. ( )1. A.to travel( )2. A.different( )3. A.shower ( )4. A.floor ( )5. A.runs ( )6. A.Adults ( )7. A.gets ( )8. A.It ( )9. A.Since ( )10. A.cleaned B.traveling B.same B.rest B.bath B.stands B.Old people B.to get B.This B.If B.to clean C.traveled C.similar C.sleep C.wall C.lies C.Children C.getting C.That C.While C.cleaning 查看答案
题型：问答题 简答题 在OSPF协议中Network LSA使用（）描述一个广播网段或者一个NBMA网段。A.Link IDB.Net maskC.Attached Router listD.Metric 查看答案
题型：问答题 简答题 Since life began eons ago, thousands of creatures have come and gone. Some, such as the dinosaurs, became extinct due to naturally changing ecologic conditions. More recent threats to life forms are humans and their activities. Man has drained marshes, burned prairies, dammed and diverted rivers. Some of the more recent casualties of man’s expansion have been the dodo, great auk, passenger pigeon, Irish elk, and Steller’s sea cow. Sadly, we can no longer attribute the increasing decline in our wild animals and plant species to "natural" processes. Many species are dying out because of exploitation, habitat alteration or destruction, pollution, or the introduction of new species of plants and animals to an area. As mandated by Congress, protecting endangered species, and restoring them to the point where their existence is no longer jeopardized, is the primary objective of the U.S. Fish and Wilidlife Service’s Endangered Species Program.Which of the following has become extinct due to man’s destruction A．African elephantB．Irish elkC．Giant pandaD．White Bengal 查看答案