数据库概念设计是指使用()图来设计。A.流程图 B.U/C图 C.E-R图 D.结构

题型:单项选择题

问题:

数据库概念设计是指使用()图来设计。

A.流程图

B.U/C图

C.E-R图

D.结构图

考点:大学试题管理信息系统(MIS)管理信息系统(MIS)题库
题型:单项选择题

下面的记录卡是刘刚、李明、张琳同学在进行校园生物调查时的记录。请根据卡片中提供的信息回答下面的问题。

(1)他们将调查的生物分成A、B两类,A类是           ,B类是          

(2)他们将A又分成两类:A1的特点是                             。A2的特点是                              

(3)他们将B分成三类,他们的分类标准是什么?B1、B2、B3各指哪些动物?________________________________________。

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变性蛋白质最主要的生物学特点是()

A.黏度下降

B.溶解度增加

C.不易被蛋白酶水解

D.生物学活性丧失

E.容易被盐析出

题型:单项选择题

国内某开证行于2014年1月18日应甲公司的申请对美国摩根大通银行开立一笔即期付款信用证。申请人应受益人美国某公司的要求,在信用证内规定限制通知行(摩根大通银行)议付并允许该证被保兑。该信用证最终被议付行(即通知行摩根大通银行)加具保兑,并授权议付行在收妥受益人提交的全套单证相符的单据后即可以偿付受益人,并向开证行索汇(未指定另外偿付行)。根据以上资料,回答下列问题:

在该案例中所采取的结算方式的作用有()。

A.银行的保证作用

B.银行的支付作用

C.融通资金的作用

D.促进进出口贸易的作用

题型:单项选择题

离子间协助作用

题型:单项选择题

(B)

My father was chief engineer of a merchant ship, which was sunk in Word War Ⅱ, The book Night of the U-boats told the story.

Memories

In September, 1940, my mother, sister and I went to Swansea, where my father’s ship was getting ready to sail. We brought him a family photograph to be kept with him at all times and keep him sale.

Then I remember my mother lying face down, sobbing. She had heard from a friend that the ship had been sunk by a torpedo(鱼雷).

I can remember the arrival of the telegram (电报), which in those days always brought had news. My grandmother opened it. It read, "Safe. Love Ted."

My most vivid memory is being woken and brought down to sit on my father’s knee, his arm in a bandage.

He was judged unfit to return to ea and took a shore job in Glasgow for the rest of the war. For as long as I can remember, he had a weak heart. Mother said it was caused by the torpedoes. He said it was because of the cigarettes, whichever, he died suddenly in his early 50s.

Ten years later I read Night of the U-bouts and was able to complete the story.

Torpedo

One torpedo struck the ship; Father was in the engine room, where the third engineer was killed. He shut down the engines to slow the ship making it easier for it to be abandoned.

By the time he got on desk (甲板) he was alone. Every lifeboat was gone except one which had stuck fast. When he tried to cut it free, it swung against the ship, injuring his hand and arm. He had no choice but to jump—still with the photograph in his pocket.

Three days later, he and other survivors were safe in Glasgow. All 23 with him signed the back of the photograph.

A Toast

In my room is the book and the photograph. Often, glass in hand; I have wondered how I would have dealt with an explosion, a sinking ship, a jump into a vast ocean and a wait for rescue Lest(以免)we forget, I have some more whisky and toast the heroes of the war.

What can we know about the author’s father after his ship was attacked()

A. He lost his arm.

B. He repaired the engines.

C. He managed to take a lifeboat.

D. He was the last to leave the ship.

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