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【简答题】
Reading has always been my home, my ____, my great invincible companion... I read because I loved it more than any other activity on earth. 2.Of those of us who read because we love it more than anything, who feel about bookstores ____ some people feel about jewelers. 3.How many times had I gone up the steps to the ____ with the Sydney Cartoon as he went to that far, far better rest at the end of A Tale of Two Cities. 4.It never seemed to me like a book, but like a place I had lived in, had visited and would visit again, ____ all the people in them, every blessed one... were more real than the real people I knew. 5.Of all the many things in which we recognize some universal comfort––God, sex, food, family, friends––reading seems to be the one in which the comfort is most ____, at least publicly. 6.There is something in the American character that is even secretly ____ to the act of aimless reading, a certain hale and heartiness that is suspicious of reading as anything more than a tool for __7__. Reading for __8__ was replaced by reading for __9__, and kind of dogged self -improvement. 10.There was good reading, and there was bad reading. There was the worthy, and the ____. A.advancement B.just as C.hostile D.guillotine E.purpose F.pleasure G.sustenance H.undersung I.trivial J.the way
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【多选题】设R是集合A上的等价关系,则关系R所具有的三个特性是 , ,
A.
自反性
B.
对称性
C.
传递性
【判断题】铸造时直接形成铸型的原材料主要为型砂,液态金属完全靠重力充满整个铸型型腔时,称为砂型铸造。
A.
正确
B.
错误
【单选题】设集合 上的关系 具有( ).
A.
自反性
B.
对称性
C.
传递性
D.
以上答案全对
【判断题】平面交叉口交通管理的主要目的是减少冲突点、提高安全性、控制车辆行驶的相对速度,并为公共交通提供优先通行权。
A.
正确
B.
错误
【判断题】设R为非空集合A上的关系,R为A上的偏序关系,则R在集合S具有自反性、对称性和传递性。
A.
正确
B.
错误
【单选题】设R为非空集合A上的关系,则R在集合A上一定具有如下()关系属性
A.
自反性、对称性和传递性
B.
反自反性、对称性和传递性
C.
对称性和传递性
D.
自反性、反对称性和传递性
【单选题】在神经网络的训练过程中,是如何确定权重W和偏置b的?
A.
随机赋值,祈祷它们是正确的
B.
搜索所有权重和偏差的组合,直到得到最佳值
C.
赋予一个初始值,计算y=x*w+b,减少y值与实际值的差值,然后迭代更新权重
D.
以上都不正确
【单选题】设关系R是集合A上的关系,其关图如下所示,则R具有的性质是( )。
A.
对称性
B.
反自反性
C.
自反性
D.
传递性
【简答题】当直接形成铸型的原材料主要为型砂,且液态金属完全靠重力充满整个铸型型腔时,这种铸造方法称为 铸造。
【简答题】设R是集合A上的等价关 系,则R所具有的关系的三个特性是
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