【简答题】水力发电设备通过使水流经涡轮发电机系统可以100MW的功率产生电能。(1)如果水垂直下落100m到达涡轮发电机,估算单位时间内流出的水量;(2)水从 的水库下落,水平面的下落速率多少(水的密度为 )?
【单选题】环甲膜穿刺针留置时间不直过长,一般不超过
【单选题】管理活动中一定会有人的精神存在, 马云把艺术融入了公司管理之中,注重企业的长远发展,其重在强调:
【单选题】企业接受投资者投入实物,能引起资产和所有者权益同时增加。( )
【单选题】大多字处理软件都可以打开的文档格式是哪个?
【单选题】以下( ) 交易机制的特点为:投资者买卖证券的对手是其他投资者。
【单选题】Paul rents out a house which is fully furnished. The house does not qualify as a furnished holiday letting. Paul paid the following expenses in relation to the letting: £ New chairs for garden (not pr...
【简答题】The little boy entered the house, unhappy. His mother was 31 cakes in the kitchen. She smiled as she 32 but stopped when she saw his face. “Tyler, 33 happened? Is everything okay?” “Nothing is okay, m...
【简答题】Today is Tuesday. We are having a ___31___ class in the classroom. Ms Chen is telling us what water is like. After that, she asks us “___32_ water like?” No one speaks for __33__ minutes. Ms Chen asks...
【简答题】设矩阵 可逆,向量 是矩阵A * 的一个特征向量,λ是α对应的特征值,其中A * 是矩阵A的伴随矩阵,试求a,b和λ的值. 分析 由特征向量的定义,可得一个三元联立方程,由此可解出所求的参数.