计算机网络技术的核心是()。 A.通信技术和半导体技术 B.网络技术和计算机技术 C

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问题:

计算机网络技术的核心是()。

A.通信技术和半导体技术

B.网络技术和计算机技术

C.通信技术和计算机技术

D.半导体技术和计算机技术

考点:电气工程公共基础第八章计算机技术第八章计算机技术题库
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科学证明通过人体的电流超过0.005A时,就会危及生命。( )

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正常机体中的无菌部位是()

A.皮肤表面

B.黏膜表面

C.外耳道

D.血液

E.眼结膜

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如图所示,滑雪爱好者从静止沿山坡匀加速滑下,在水平雪面上匀减速滑行一段距离停止,沿山坡下滑的距离比在水平雪面上滑行的距离大,斜面与水平雪面平滑连接.图乙中,x、v、a、F分别表示滑雪爱好者位移大小、速度大小、加速度大小以及合力大小.则图乙中正确的是(  )

A.

B.

C.

D.

题型:单项选择题

阅读理解

                                           When Milk Arrived on the Doorstep

     When I was a boy growing up in New Jersey in the 1960s, we had a milkman delivering milk to our

doorstep.His name was Mr Basille.He wore a white cap and drove a white truck.As a 5yearold boy, I

couldn't take my eyes off the coin changer fixed to his belt.He noticed this one day during a delivery and

gave me a quarter out of his coin changer.

     Of course, he delivered more than milk.There was cheese, eggs and so on.If we needed to change our order, my mother would pen a note"Please add a bottle of buttermilk next delivery"and place it in the box

along with the empty bottles.And then, the buttermilk would magically appear.

     All of this was about more than convenience.There existed a close relationship between families and

their milkmen.Mr Basille even had a key to our house, for those times when it was so cold outside that we put the box indoors, so that the milk wouldn't freeze.And I remember Mr Basille from time to time taking a break at our kitchen table, having a cup of tea and telling stories about his delivery.

     There is sadly no home milk delivery today.Big companies allowed the production of cheaper milk, thus making it difficult for milkmen to compete.Besides, milk is for sale everywhere, and it may just not have

been practical to have a delivery service.

     Recently, an old milk box in the countryside I saw brought back my childhood memories.I took it home and planted it on the back porch (门廊).Every so often my son's friends will ask what it is.So I start

telling stories of my boyhood, and of the milkman who brought us friendship along with his milk.

1. Mr Basille gave the boy a quarter out of his coin changer________.

A. to show his magical power

B. to pay for the delivery

C. to satisfy his curiosity

D. to please his mother

2. What can be inferred from the fact that the milkman had the key to the boy's house?

A. He wanted to have tea there.

B. He was a respectable person.

C. He was treated as a family member.

D. He was fully trusted by the family.

3. Why does home milk delivery no longer exist?

A. Nobody wants to be a milkman now.

B. It has been driven out of the market.

C. Its service is getting poor.

D. It is forbidden by law.

4. Why did the author bring back home an old milk box?

A. He missed the good old days.

B. He wanted to tell interesting stories.

C. He needed it for his milk bottles.

D. He planted flowers in it.

题型:单项选择题

急性脊髓炎与急性硬膜外脓肿鉴别在于后者()

A.存在化脓性病灶

B.脊柱相应局部疼痛及明显压痛

C.瘫痪严重

D.尿便障碍明显

E.如腰穿可显示椎管梗阻

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