若函数f(x)=x3-3x 在区间(k ,k+1 )上不是单调函数,则实数k 的

题型:选择题

问题:

若函数f(x)=x3-3x 在区间(k ,k+1 )上不是单调函数,则实数k 的取值范围是[ ]

A.k≤-2或-1≤k≤0,或k≥1

B.-2<k<2    

C.-2<k<-1或0<k<1

D.不存在这样的实数

考点:函数的单调性与导数的关系
题型:选择题

阅读下面一篇短文,判断下面的句子是否符合短文内容。符合的用“T”表示, 不符合的用“F”

表示,填在题前的括号里。

    The "big day" has arrived for Agnes. She is finally leaving the hospital after a long illness. Her husband,

Clark, is pushing her in a wheelchair. They say good-bye to the nurses as they pass by on their way to the

hospital.

    Agnes was ill for more than six weeks. The doctors were not sure about her illness. At first they thought

that she needed an operation (手术). Finally, after many tests, the doctors gave her some new medicine.

Now, she is nearly well.

( ) 1. The story took place in the hospital.

(     ) 2. Agnes was ill for over six weeks.

( ) 3. At first the doctors thought they should operate on her.

(     ) 4. After an operation, the doctors gave her some new medicine.

( ) 5. Agnes is OK now.

题型:选择题

以下事件可用二项分布来描述的是______。

A.对批量为25的产品进行检验,发现的不合格品在5个以下

B.奥运会射击比赛中,选手击中靶的环数

C.某铸造厂产品上出现的砂眼数

D.检验某种产品是否合格

题型:选择题

可以使用5种不同的数据类型描述数据库文件中的字段,它们分别是字符型(C)、数值型(N)、日期型(D)、逻辑型(L)和( )

A.屏幕型(S)

B.备注型(M)

C.浮点型(F)

D.全局型(PUB)

题型:选择题

胸部高分辨力CT扫描的适应证,不包括()

A.肺间质纤维化

B.肺气肿

C.矽肺

D.大叶性肺炎

E.支气管扩张

题型:选择题

词史上第一个以诗为词,开拓词境的词人是哪一位?

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