阅读理解。 A group of swans flew down to a b

题型:阅读理解

问题:

阅读理解。

     A group of swans flew down to a beach where a crow (乌鸦) was jumping around. The crow watched

them with disdain (鄙视).

     "You have no flying skills at all!" he said to the swans. "All you can do is to move your wings. Can you

turn over in the air? No, that's beyond you. Let's have a flying competition. I'll show you what real flying is!"

     One of the swans, a strong young male, took up the challenge (挑战). The crow flew up and began to

show his skills. He flew in circles, performed other flying tricks, and then came down and looked proudly

at the swan.

     Now it was the swan's turn. He flew up, and began flying over the sea. The crow flew after him, making

all kinds of comments (评价) about his flying. They flew on and on till they couldn't see the land and there

was nothing but water on all sides. The crow was making fewer and fewer comments. He was now so

exhausted that he found it hard to stay in the air, and had to struggle to keep himself from falling into the water.

     The swan pretended (假装) not to notice, and said, "Why do you keep touching the water, brother? Is that

another trick?" "No," said the crow. He knew he had lost the competition."I'm in trouble because of my pride

(自大)! If you don't help me, I'll lose my life..."

     The swan took pity on him, and took him on his shoulders and flew back to the beach.

1. What's the correct order of the following events?

    a. The crow followed the swan and got into trouble.

    b. The swan felt pity for the crow and saved it.

    c. The crow had to ask the swan for help.

    d. The swan accepted a challenge of performing flying tricks.

A. a, d, b, c

B. a, b, d, c

C. d, a, c, b

D. d, c, a, b

2. What does the underlined word "exhausted" in Paragraph 4 mean?

A. Tired.

B. Bored.

C. Nervous.

D. Frightened.

3. What do we learn from the passage?

A. Practice makes perfect.

B. The early bird catches the worm.

C. No pains, no gains.

D. Pride goes before a fall.

考点:故事类阅读
题型:阅读理解

阅读以下关于UML建模技术在某前台销售子系统的应用说明,根据要求回答问题。
[说明]
某超市管理系统的前台销售子系统以最基本的方式处理销售业务。系统的功能需求如下。
(1)记录每种商品的编号、单价和现有数量。
(2)为顾客选购的商品计价、收费,并打印清单。
(3)帮助商家找出哪种商品将脱销,从而及时补充货源。
(4)随时按上级系统的要求报告当前的款货数量、增减商品的种类或修改商品定价。
(5)交接班时结算货款数目和商品数目。
每台收款机可以处理任何数目的销售事件,但一个销售事件只能由一台收款机处理。每个销售事件从收款机响应收款人员的指令开始,先向商品发送检索请求消息来查找将被出售的商品。如果该商品的数量少于下限,则向供货员发送缺货登记消息。每名供货员可以提供一种或多种商品,同一品牌的商品只能由一位供货员来提供。接着收款机发送计价和入账消息请求售出操作,再由销售事件发送记账消息给相应的账册,并控制流程返回收款机等待下一次销售操作。每本销售账册可以记录任何数目的销售事件,但一个销售事件只能由一本销售账册记录。
该销售子系统采用面向对象方法开发,系统中的类及类之间的关系用UML类图表示,图4-12是该系统类图中的一部分;系统的动态行为采用UML序列图表示,图4—13是销售事件部分的序列图。

[问题2]
识别关联的多重度是面向对象建模过程中的一个重要步骤。请根据说明中给出的描述,将图4-12中(1)~(8)空缺处的内容填写完整。

题型:阅读理解

一质量为M的平板车以速度v在光滑水平面上滑行,质量为m的烂泥团从离车h高处自由下落,恰好落到车面上,则小车的速度大小是(  )

A.仍是v

B.

Mv
m+M

C.

m
2gh
m+M

D.

Mv+m
2gh
m+M

题型:阅读理解

目前为抵抗西南大旱,党中央组织各级政府积极打井汲取地下水帮助百姓渡过难关.饮用遭到污染或硬度大的地下水不利于人体健康.为此我们还应对其进行进一步的处理.

(1)测定地下水的酸碱度,方法是______.

(2)地下水经过沉淀后,还必须对其进行消毒.我们通常使用漂白粉,其有效成分次氯酸钙可发生如下反应:Ca(ClO)2+X+H2O=CaCO3↓+2HClO,则X的化学式为______.

题型:阅读理解

沙井施工可采用()。

A.人工挖掘法

B.空心管法

C.射水法

D.爆破法

题型:阅读理解

企业整体评估与企业单项资产的汇总评估是有区别的,区别表现在()。

A.两种评估的目的是不同的

B.单项资产评估汇总确定的企业评估值总高于企业整体评估值

C.两种评估所确定的价值量一般是不相等的

D.两种评估确定的评估价值的含义是不同的

E.企业整体资产评估是一种静态反映,利用单项资产评估值汇总评估是一种动态反映

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