主页
学科
搜索
账户
常见问题
当前学科：建筑物理与建筑设备（一级）
题目：
多选
在自动喷水灭火系统中，闭式喷头安装形式的不同可分为（）。
A . A、直立型喷头
B . B、边墙型喷头
C . C、下垂型喷头
D . D、玻璃球喷头
E . E、易熔元件喷头
答案：
<查看本题扣1积分>
查看答案
答案不对？请尝试站内搜索
推荐知识点:
根据项目业主的工作程序，投资机会的选择主要包括投资意向、（）、项目建议书三项工作。
职业健康教育类型主要有现况研究、策略开发、干预效果评价研究和（）
畸胎瘤的结构可以包括（）
急危重症患者转入ICU治疗时，以下错误的是：（）
房地产作为不动产，是最基本、最重要的（）。
检测脑囊虫病灵敏度较高的试验是脑脊液（）。
下列各脏中，其生理特性以升为主的是（）。
Once we learn the rules for map reading, they seem so simple: up is north, blue is water, a star stands for a capital. But when and how do we learn to read a map? Research shows that even three-year-olds can master, at least in a basic way, the key map-reading concept(概念): a map is a two-dimensional symbol(二维的符号)for three-dimensional space. Linda Acredolo of the University of California, showed a child a map of a room pointed out on it where a toy was hidden and asked the child to find that toy. Depending on the maps orientation(方位), about half the three-year-olds could successfully do so. Three years may be the age at which the ideas become fully understood. Judy Deloache of the University of Illinois let children watch her hide a small toy in a scale model of a room and asked them to find a large one in a real room. "A three-year-olds can do it, but a two-year-olds has no idea that the model has to do with anything larger, " she says. But even if the basic concept is there early, Lynn Liben and Roger Downs of Pennsylvania State University found that children still have a lot to learn. Second graders believe that north is always at the top of a map because of the hanging maps they have seen. "If you asked them to close their eyes and point in the direction of north, often theyll point straight up," says Lihen. She says that children get map-reading skills gradually, and teachers must begin by using maps of familiar areas: their own classrooms, homes, and neighbourhoods.The first two experiments show that______.A．children have better understanding than grown-upsB．children have special natural ability for map readingC．children are more interested in toys than in mapsD．children can start to learn map-reading early
气胸患者胸腔穿刺部位常选择锁骨中线第__________肋间或腋中线__________肋间。
数码相机