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【单选题】
关于K均值算法,以下说法不正确的是( )。A.
K均值丢弃被它识别为噪声的对象
B.
K均值属于划分方法
C.
K均值很难处理非球形的簇和不同大小的簇
D.
K均值可以发现不是明显分离的簇
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【简答题】大情景 2. A guest calls the operator of the hotel and makes inquires about the weather of the next day and also the ways to get on outside line. (P8 C2U1b)
【单选题】A guest calls and ____ about the room status.
A.
explains
B.
complains
C.
tells
D.
says
【简答题】Whenever you send a letter or a postcard，you have to put stamps on the envelope or on the card．When did people first begin to use stamps?Who was thefirst to think of this idea? In the early nineth...
【判断题】When making up the room a room attendant should answer the phone calls and take message if the guest is not in.
A.
正确
B.
错误
【简答题】Online schools, which ________ the needs of different people, have emerged as an increasingly popular education alternative. A) stir up B) switch on C) cater to D) consent to
【简答题】阅读理解。 America is a country on the move. In unheard of number, people of all ages are exercising their way to better health. According to the latest figures, 59 percent of American s exercise regu...
【简答题】稳定型心绞痛可选用
【单选题】以下关于我国公民与人民两个概念关系的说法，错误的是( )
A.
公民是法律概念，人民是政治概念
B.
人民在不同的历史时期有着不同的内容
C.
人民的范围比公民的范围更广
D.
公民所表达的一般是个体的概念，人民所表达的是群体的概念
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