设级数发散,则级数

题型:单项选择题

问题:

设级数

发散,则级数

考点:普通考研考研数学(三)考研数学三
题型:单项选择题

    Long ago,Bluebird's feathers were the colour of dust. She did not like her ugly colour.She was attracted

by the colour of the lake near her home. It was as blue as the sky after a storm. Bluebird wanted to be the

colour of that beautiful lake very much.

    Flapping her wings one morning, Bluebird flew from her tree to the blue lake. Then she bathed in the water

three times. After each bath, she sang, "Blue water. Still water. I went in. I am blue. " Bluebird repeated this every

morning. On the third day, she came out the lake with beautiful blue feathers.

    Now Coyote was a trickster (骗子) —and hungry too. He stayed behind Bluebird 's tree for a long time every

day and watched her go to the lake. He pretended (伪装) to be interested in everything she did. He wanted Bluebird

for lunch, but he was afraid of the blue water.

    On the third Morning, Coyote saw Bluebird come out of the lake with beautiful blue feathers. Impressed, he

sat next to Bluebird's tree and waited for her. When she returned, he asked, "How did you get blue feathers? I

want to be blue like the mountains too. "Bluebird didn't believe Coyote, but she taught him how to bathe three

times each morning and how to sing her song. Coyote did what she said, and after three days of bathing in the

lake, his white fur turned deep blue.

    Convinced (确信的) that blue fur was even more beautiful than blue feathers, Coyote forgot all about being

hungry. He ran as fast as he could to the top of the hill. Standing on his back legs, he raised his front legs off

the ground and howled. But Coyote slipped (滑倒) and rolled down the hill. He couldn't stop himself,and the dust

and dirt covered his new blue fur. He rolled and rolled until he hit into Bluebird's tree heavily. No matter how

much he tried, foolish Coyote could not shake the dust from his fur. And so the fur of all coyotes has the dull

colour of dust to this very day.

1. How many times did Bluebird bathe every morning before she had beautiful blue feathers?

A. Three times.

B. Four times.

C. Five times.

D. Six times.

2. Why was Coyote a trickster?

A. He wanted to fly like Bluebird near the mountains.

B. He wanted to eat Bluebird but pretended to be curious.

C. He wanted to swim in the lake but was afraid of the water.

D. He wanted to sing Bluebird's song but didn't know the words.

3. Where did Coyote go after his fur turned blue?

A. To the lake.

B. To the tree.

C. To the cave.

D. To the hill.

4. Why did Coyote forget all about being hungry?

A. Because his fur had the dull colour of dust.

B. Because the dust and dirt covered his new blue fur.

C. Because he hit into Bluebird's tree and hurt himself.

D. Because he thought blue fur was much more beautiful.

5. What words does the writer use to help you imagine the colour blue?

A. sky,lake,mountains

B. bird,coyote,storm

C. flapped,climbed,bathed

D. fur,feathers,dust

题型:单项选择题

隧道内电缆支架上夹板固定位置要统一,以使电缆与洞壁之间的距离保持一致,洞内防火型二用吊夹一般每隔()安装一个。

A、4.5m

B、5m

C、5.5m

D、6m

题型:单项选择题

下列各句中,加点的成语使用恰当的一项是(3分) 

A.许多文言句子如果仅照字面解释、翻译,可能会晦涩难懂,一旦使用意译的方法

则焕然冰释,也符合了“信”“达”“雅”的要求。

B.当社会各阶层人士都为受灾的台湾同胞慷慨解囊时,这位据说身家过亿的富豪却

细大不捐,引起了大家的议论。

C.与“说书”不同,“学术”宣讲必须立论严谨,言之有据,不可由着性子臆造,更

不可为了耸人听闻而言之凿凿。

D.世界闻名的记者、卓有成就的翻译家、作家萧乾先生早在上世纪30年代初就因长篇小说《梦之谷》而名噪一时。

题型:单项选择题

下列哪种方式可以起到保护自己实拍的图片不被他人盗用的效果()

A、在图片中添加自己的店铺特色的水印(非第三方平台)哦)

B、图片像素增大10%

C、保存实拍原始图片

D、图片上传到1号店空间

题型:单项选择题

仪器分析灵敏度高,所以其检验结果往往比化学方法准确。

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