【简答题】(2011?成都)在三角形纸片ABC中,已知∠ABC=90°,AB=6,BC=8.过点A作直线l平行于BC,折叠三角形纸片ABC,使直角顶点B落在直线l上的T处,折痕为MN.当点T在直线l上移动时,折痕的端点M、N也随之移动.若限定端点M、N分别在AB、BC边上移动,则线段AT长度的最大值与最小值之和为______(计算结果不取近似值)
【单选题】选择下列命题中正确的选项:
C.
守恒量 是指体系在任何状态中,平均值 不随时间变化的力学量,而在该状态中的测量值的几率分布是随时间变化的
【简答题】Moving to a new city and state was difficult for me, especially in winter. Little did I know that a Colorado snowstorm would greet me after I had been in my new home for only a week. I just missed hom...
【单选题】 The state wants to cut away $40 million from the higher education ______.
【单选题】 ________wants the book may have it.
【单选题】复式记账的理论基础,也是编制资产负债表的理论依据
【单选题】The message that a new teacher will teach us English next term reached me yesterday.