下列证券中,()一般设有到期期限。 A.债券 B.普通股 C.基金 D.金融期货合约

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问题:

下列证券中,()一般设有到期期限。

A.债券

B.普通股

C.基金

D.金融期货合约

考点:证券投资证券投资综合练习证券投资综合练习题库
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点A表示-3,在数轴上与点A距离5个单位长度的点表示的数为______.

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The central problem of economics is to satisfy the people’s and nation’s wants. The problem we are faced with is that our (1) , here identified as money, are (2) . The only way we can resolve our (3) is to make choices. After looking at our resources, we must examine our list of (4) and identify the things we need (5) , those we can postpone, and (6) we cannot afford. As individuals, we face the central problem involved in economics — deciding just how to allocate our limited resources to provide ourselves with the greatest (7) of our wants.
Nations face the same problem. As a country’s population (8) , the need for more goods and services grows (9) . Resources necessary to production may increase, but there are (10) enough resources to satisfy the total desires of a (11) . Whether the budget meeting is taking place in the family living-room, in the conference room of the corporation (12) of directors, or in the chamber of the House of Representatives in Washington, the basic problem still exists. We need to find (13) of allocating limited resources in order to satisfy unlimited wants.
A short time ago, economists divided goods into two categories, free and economic. The former, like air and water, were in (14) abundance that economists had no concern about (15) of scarcity and what to do about it. Today many of these "free goods" are in (16) very expensive to use. Pollution has made clean air and water expensive for producers who have to filter their waste products, for consumers who ultimately pay for the producers’ extra costs, and (17) tax-payers who pay for the government’s involvement in cleaning the environment.
In the 1990s, almost all goods are (18) . Only by effort and money can they be (19) in the form people wish.
Meeting the needs of people and the demands from resources available leads to the basic activity of production. In trying to (20) unlimited wants from limited economic goods, production leads to new problems in economics.

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胃溃疡大出血最主要的治疗方式是

A.肝叶切除术
B.胃大部切除
C.三腔两囊管压迫
D.奥美拉唑静脉点滴
E.高选择性迷走神经切断

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下列属于单性花,且是雌雄同株的植物是()。

A、牡丹

B、百合

C、仙客来

D、杨柳

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病理性近视是一种与HLA基因有关的常见眼病,具有发病早、发病快、近视度数随年龄增加等特征。下面是某病理性近视家族遗传系谱图(相关基因用H和h表示),请分析回答:

已知HLA基因有3000个碱基,其中胸腺嘧啶900个。在含32P的培养基中连续复制2次,需消耗鸟嘌呤脱氧核苷酸()个,子代中放射性DNA分子的比例是()

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