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问题 选择题

下列仪器不可用于物质分离的是（　　）

A．漏斗

B．蒸馏烧瓶

C．分液漏斗

D．容量瓶

答案

A．过滤使用漏斗，可用于物质分离，故A不选；

B．蒸馏烧瓶常用于蒸馏，可用于物质分离，故B不选；

C．分液漏斗常用于分液，可用于物质分离，故C不选；

D．容量瓶常用于配制一定物质的量浓度的溶液，不能用来分离，故D选．

故选D．

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 To get cash, for example, you are instructed to (11) that indicate whether the money should be withdrawn from a checking or a savings account and the (12) .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times, most machines will (18) .As another precaution against (19) , the bank generally limits the amount that may be withdrawn by cash card (20) , say, to $ 200.
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单项选择题

鳃裂囊肿常位于胸锁乳突肌的（）

A.上1/3前缘

B.中1/3前缘

C.上1/3后缘

D.中1/3后缘

E.下1/3前缘
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