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问题 不定项选择

2010年某国玉米的期初库存为1000万吨，当年玉米产量为10000万吨，当期消费为9000万吨，当年进口量为200万吨，出口量为300万吨，则该国期末库存为（）万吨。

A.1700 

B.900 

C.1900 

D.700

答案

参考答案：A, C

解析：

国内生产总值有三种核算方法，即生产法、收入法和支出法。这三种方法分别从不同的方面反映国内生产总值及其构成。在宏观经济分析中，经常采用支出法计算GDP，公式为：GDP=C+I+G+NX式中，C为消费；I为投资；G为政府购买；NX为净出口。

填空题



In the early 1970’s, Citibank of New York City became one of the first financial institutions to install ATM’s on a large scale. Since then, the (1) of automated teller machines has increased dramatically. At the time, the bank hoped (2) their operating costs by replacing human tellers with machines. Little did they (3) that the cash machines would become so successful. However, as more banks added (4) automated service through ATM’s, the machines mushroomed all over the world.
To use an ATM, all you need is a (5) issued by your bank. Your bank may also (6) through a credit card, such as MasterCard or Visa. To begin a (7) , you need to insert the card into an ATM and punch in a personal identification number on the (8) . The personal ID number may consist of (9) and can prevent anyone from using the card.
The ATM next flashes instructions on its (10) for carrying out transaction. To get cash, for example, you are instructed to (11) that indicate whether the money should be withdrawn from a checking or a savings account and the (12) . This request is then displayed on the screen. After you press a button to (13) that the information is correct, the ATM goes to (14) .
How safe, you may ask, is banking by ATM The (15) is meant to prevent anyone, no matter who you are, from using a cash card (16) . If you enter the wrong ID number for a card, a message on the screen will (17) . If you fail to produce the correct number for three times, most machines will (18) .As another precaution against (19) , the bank generally limits the amount that may be withdrawn by cash card (20) , say, to $ 200.
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多项选择题

临床上可增强肌松药作用的抗生素（）

A.丁胺卡那霉素

B.链霉素

C.庆大霉素

D.青霉素

E.头孢霉素
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