皮皮学，免费搜题
登录
搜题
【简答题】
为测定某车间中一台机器的噪声大小,从声级计上测得声级为 104 dB ,当机器停止工作, 测得背景噪声为 100dB ,求该机器噪声的实际大小。 ( 下附声级运算减法表 , 单位 dB) ΔL PB 1 2 3 4 5 Δ L Ps 6.9 4.4 3 2.3 1.7
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【多选题】对于启发式图搜索策略，下面叙述正确的是（ ）
A.
估价函数中，从初始结点到 n 结点的实际代价的比重越小，越倾向于宽度优先搜索方式
B.
估价函数中，从初始结点到 n 结点的实际代价的比重越大，越倾向于宽度优先搜索方式
C.
估价函数中，从 n 结点到目标结点的最佳路径的估计代价的比重越小，越倾向于启发式搜索方式
D.
估价函数中，从 n 结点到目标结点的最佳路径的估计代价的比重越大，越倾向于启发式搜索方式
【单选题】The number 4. 123 is read__________.
A.
four thousand one hundred and twenty-three
B.
four thousand and one hundred twenty-three
C.
four thousand and a hundred and twenty-three
【单选题】将拉结钢筋锚固在带有螺旋筋加固的预留孔内,通过高强度无收缩水泥砂浆的灌浆后实现力的传递,这种预制构件钢筋连接方式为( )。
A.
钢筋浆锚搭接连接
B.
套筒灌浆连接
C.
直螺纹套筒连接
D.
波纹管连接
【简答题】There are all together 13 tips mentioned in the article. Tell one of your photo-taking experiences. Choose the one involving matching behaviors to the tips which made you cheerful because of the ama...
【单选题】You manage a department of five employees. You have identified that Joe has high need for achievement, Mary has high need for power, and Tim has high need for affiliation. Sarah scored high on the nee...
A.
Joe
B.
Mary
C.
Tim
D.
Sarah
E.
Doug
【单选题】The compilation of average SAT scores for students enrolled in your college, along with an analysis of enrollment information and a statistical analysis of these scores compared to competitive schools...
A.
data
B.
information
C.
knowledge
D.
business intelligence
【简答题】Listen and number. (听录音，给下列图片排序) 1. ( ) 2. ( ) 3. ( ) 4. ( ) 5. ( )
相关题目：