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Which of the following about saccharin is true?
A.Saccharin was found by chancE.
B.After doing many experiments, Walters finally found saccharin.
C.Waiters,noticed that saccharin could be used as a substitute for table sugar.
D.A scientist found saccharin at dinner.

A.Saccharin
B.
B.After
C.
C.Waiters,noticed
D.
D.A

【参考答案】

A
本题考查考生把握细节的能力。考的是有关糖精的正确说法的选项。选项A：糖精是偶然被发现的。这和文章第一段第二句......

(↓↓↓ 点击下方‘点击查看答案’看完整答案 ↓↓↓)

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Squishy (可挤压的)Cellphones Add a Buzz (振动声) to CallsVibrating rubber cellphones could be the next big thing in mobile communication.They allow people to communicate by squishing the phone to transmit __ (1) along with their spoken words． According to a research team at the MIT Media Lab in Cambridge, Massachusetts, the idea will make __ (2) more fun.Many mobile phones can already be made to vibrate __ (3) ring when you do not want people to know you are getting a call．But these vibrations(振动),__ (4) by a motor spinning an eccentric(离心的，偏轴的) weight inside the device, are too crude for subtle communication, says Angela Chang of the lab's Tangible Media Group．'They are__ (5) on or off,' she says.But when you grip Chang' s prototype (样机) latex (橡胶) cellphone, your fingers and thumb wrap around five __ (6) speakers．They vibrate__ (7) your skin around 250 times per seconD.Beneath these speakers sit pressure sensors(传感器), so you can transmit vibration as well as __ (8) it．When you squeeze with a finger, a vibration signal is transmitted __ (9) your caller's corresponding finger．Its __ (10) depends on how hard you squeezE.She says that within a few minutes of being given __ (11) the phones, studentswere using the vibration feature to add emphasis to what they were saying or to interrupt the other speaker．Over time, people even began to transmit their __ (12) kind of ad hoc(专门的) 'Morse Code' (摩尔斯电码), which they would repeat back to show they were following what the other person was saying． 'It was pretty easy to communicate,though we didn't specifically pre-arrange __(13),' says David Milovich, one of the students who tried out the devicE.Chang thinks 'vibralanguages' could__(14) for the same reason as texting(发短信) : Sometimes people want to communicate something __ (15) everyone nearby knowing what they're saying．'And imagine actually being able to shake someone's hand when you close a business deal,' she says.第 51 题A.voicesB.messagesC.vibrationsD.feelings

A.They
B.
Many
C.But
D.'They
E.
But
F.They
G.When
H.Its
I.
She
J.Over
K.
Chang
L.'And
M.voices
N.messages
O.vibrations
P.feelings

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（第三章市场调查与预测）为了掌握市场信息，有效安排生产运营，某知名空调生产企业积极进行市场调查和市场预测活动。首先，该企业搜集内部和外部的历史资料及文献信息，对市场的变动规律进行分析，了解空调市场的需求状况和消费者的消费行为。随后，调查人员乔装成普通消费者在家电卖场购买空调，调查该企业空调的销售环境和销售质量。最后，调查人员在家电卖场门口随机拦截消费者，征得其同意后，通过面谈和填写问卷，了解消费者的购买动机和购买偏好。该企业空调产品2010—2012年销售额如下表示（单位：万元），企业拟对2013年的空调销售额进行预测。该企业空调产品2013年预计销售额为4000万元，若采用季节指数法进行预测，该企业2013年第三季度空调产品的销售额预测值是（）万元。

A.1000
B.1400
C.1500
D.1600

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