【单选题】根据《房屋建筑与装饰工程工程量计算规范》(GB T50854-2013),竹木地板按设计图示尺寸以面积m2计算( )。
A.
门洞、空圈、暖气包槽、壁龛的开口部分面积并人相应的工程量内
B.
不增加门洞、空圈、暖气包槽、壁龛的开口部分面积
【单选题】已知序列x(n)=RN(n),其N点的DFT记为X(k),则X(0)=( )
【单选题】诊断妊娠期糖尿病的实验室指标是
C.
两次或两次以上空腹血糖>11.2mmol/L
【单选题】诊断妊娠期糖尿病的实验室指标是
C.
两次或两次以上空腹血糖>11.2mmol/l
【简答题】阅读理解。 Many people like to travel during their vacations. Some people travel in tour groups because they think it is safe and cheap. A tour guide takes care of the group and makes sure the group can s...
【简答题】N个原子在空间规则地排列起来形成点阵结构(理想晶体).由于热涨落,原子可以离开原来的点阵位置进入点阵的间隙位置,这种空位—间隙原子称为弗仑克尔(Frenkel)缺陷(见图). 令w代表将原子从原来的位置移到间隙位置所需要的能量,当 时,缺陷数n满足 ,因而缺陷之间的相互影响可以忽略.原子可以进入的间隙位置数N'和N有相同的数量级.试证明在温度T满足 的平衡态下,缺陷的平均数n满足下列关系: 或 提...
【简答题】Travel has become a world-wide activity. 2. People travel for many reasons, but perhaps the most common is travelling for pleasure. 3. Travel is also one of the best means for learning.