简单https://assets.asklib.com/psource/2015092416532232721.jpg架可求得()
简单 https://assets.asklib.com/psource/2015093011401548880.jpg 架可求得()
简单 https://assets.asklib.com/psource/2015092816352583700.jpg 架可求得()
简单 https://assets.asklib.com/psource/2015092817292037496.jpg 架可求得()
简单 https://assets.asklib.com/psource/2015093011314367401.jpg 架可求得()
简单 https://assets.asklib.com/psource/2015111117264421265.jpg 架可求得()
某工程施工至某年5月份底,检查时得下图用历元图所示曲线,则有()。<img src='https://img2.soutiyun.com/ask/uploadfile/5046001-5049000/7aeae6284e16760875f09845f0b9bc8f.jpg' />
由<img src='https://img2.soutiyun.com/latex/latex.action' />U衰变成<img src='https://img2.soutiyun.com/latex/latex.action' />Pb,需经过若干次α衰变和( )次β衰变。
实验测得化学反应<img src='https://img2.soutiyun.com/ask/2020-03-05/952259955284323.png' />的速率方程为<img src='https://img2.soutiyun.com/ask/2020-03-05/95225996394296.png' />,根据上述条件可以认为( )
()是指材料在自然状态下单位体积的质量,用<img src='' jquery111002858246864329543=' /><img src='https://img2.soutiyun.com/ask/uploadfile/5358001-5361000/9fb1876a50b349ff8d96cca31594f965.gif' />
由<img src='https://img2.soutiyun.com/latex/latex.action' />,确定可微函数z=z(x,y)(f也可微),则<img src='https://img2.soutiyun.com/latex/latex.action' />=( )
勘察设计单位质量管理的责任和义务是()。<img src='https://img2.soutiyun.com/shangxueba/ask/18759001-18762000/18761805/2014090208505613048.png' />
从一批产品中随机抽两次,每次抽1件。以A表示事件“两次都抽得正品”,B表示事件“至少抽得一件次品”,则下列关系式中,正确的是()。<img src='https://img2.soutiyun.com/shangxueba/ask/68946001-68949000/68947848/989930489112063.png' />
抽样调查得某地200名正常成人的发汞值,资料如下表所示:<img src='https://img2.soutiyun.com/shangxueba/ask/18948001-18951000/18950681/2015082317301910405.png' />描述该资料的变异程度,宜选用()
测定某消化药片中有效成分氢氧化镁的合量得s=0.05%.若测定的精密度保持不变,当P=95%时,欲使置信区间的置信限<img src='https://img2.soutiyun.com/ask/2020-10-20/972057659119649.png' />,问至少应对试样平行测定多少次?
在题设及题1的条件下,测得样本均值<img src='https://img2.soutiyun.com/ask/uploadfile/3321001-3324000/1c1e65640a66a8dca3523bf4bf91556a.jpg' />,假定显著水平α=0.05,则袋装饼干的平均重量是()。<img src='https://img2.soutiyun.com/ask/uploadfile/3321001-3324000/2f4de9cca1d5c614f801fd43260831de.jpg' />
从风机样本上查得风机Y4-73No.20F的某工况点性能参数如下表。<img src='https://img2.soutiyun.com/shangxueba/ask/17586001-17589000/17586797/2016081214000559090.jpg' />指出以下计算哪项错误()
图示组合结构,不计杆质量,其动力自由度为:()。<img src='https://img2.soutiyun.com/1/2021-04-07/986666180871239.jpg' />
J<sub>w</sub>/SRF在岩体质量的定义式<img src='https://img2.soutiyun.com/shangxueba/ask/17637001-17640000/17639065/2015070217402177708.jpg' />中表示()。
质量为m1,半径为r的均质圆盘上,沿水平直径方向焊接一长为<img src='https://img2.soutiyun.com/shangxueba/ask/19017001-19020000/19018430/2015110209540868947.png' />,质量为m2的均质杆AB。整个物体绕圆盘中心O以角速度w转动,该物体系统的总动量的大小为()。<img src='https://img2.soutiyun.com/shangxueba/ask/19017001-19020000/19018430/2015110209544972304.png' />
不计杆的分布质量,图示体系的动力自由度为()。<img src='https://img2.soutiyun.com/1/2021-04-07/986665887381569.jpg' />
在城市生活垃圾产生量预测的增长率法中,可以由递增系数,利用基准年数据算得规划年的城市生活垃圾总量,公式为<img src='https://img2.soutiyun.com/shangxueba/ask/17997001-18000000/17998431/2015091515204040990.jpg' />。式中i表示()。
若向量β不能由<img src='https://img2.soutiyun.com/ask/2021-01-01/978361429025286.png' />线性表示,则向量组<img src='https://img2.soutiyun.com/ask/2021-01-01/978361441040973.png' />线性无关()此题为判断题(对,错)。
照片中预制墙体观感质量有哪些问题?()<img src='https://img2.soutiyun.com/1/2020-09-14/968940285207171.jpg' />