热点试题

[ 英语 ] _____ of the land in that country ______ cove

_____ of the land in that country ______ covered with trees.

A. Three quarters; is
B. Three-fourth; are
C. Three quater; is
D. Three-fourths; are

2016-05-16 | 0

[ 英语 ] One evening in February 2007, a student named

One evening in February 2007, a student named Paula Ceely brought her car to a stop on a remote road in Wales. She got out to open a metal gate that blocked her path .That’s when she heard the whistle sounded by the driver of a train. Her Renault Clio was parked across a railway line. Seconds later, she watched the train drag her car almost a kilometre down the railway tracks.
Ceely’s near miss made the news because she blamed it on her GPS (导航仪). She had never driven the route before. It was dark and raining heavily. Ceely was relying on her GPS, but it made no mention of the crossing. “I put my complete trust in the device and it led me right into the path of a speeding train,” she told the BBC.
Who is to blame here? Rick Stevenson, who tells Ceely’s story in his book When Machines Fail Us, points the finger at the limitations of technology. We put our faith in digital devices, he says, but our digital helpers are too often not up to the job. They are filled with small problems. And it’s not just GPS devices: Stevenson takes us on a tour of digital disasters involving everything from mobile phones to wireless keyboards.
The problem with his argument in the book is that it’s not clear why he only focuses on digital technology, while there may be a number of other possible causes. A map-maker might have left the crossing off a paper map. Maybe we should blame Ceely for not paying attention. Perhaps the railway authorities are at fault for poor singalling system. Or maybe someone has studied the relative dangers and worked out that there really is something specific wrong with the GPS equipment. But Stevenson doesn’t say.
It’s a problem that runs through the book. In a section on cars, Stevenson gives an account of the advanced techniques that criminals use to defeat computer-based locking systems for cars. He offers two independent sets of figures on car theft; both show a small rise in some parts of the country. He says that once again not all new locks have proved reliable. Perhaps, but maybe it’s also due to the shortage of policemen on the streets. Or changing social circumstances. Or some combination of these factors.
The game between humans and their smart devices is amusing and complex. It is shaped by economics and psychology and the cultures we live in. Somewhere in the mix of those forces there may be a way for a wiser use of technology.
If there is such a way, it should involve more than just an awareness of the shortcomings of our machines. After all, we have lived with them for thousands of years. They have probably been fooling us for just as long.
小题1:What did Paula Ceely think was the cause of her accident?
A.She was not familiar with the road.
B.It was dark and raining heavily then.
C.The railway workers failed to give the signal.
D.Her GPS device didn’t tell her about the crossing.
小题2:The phrase “near miss” (Paragraph 2) can best be replaced by______.
A.close hitB.heavy loss
C.narrow escapeD.big mistake
小题3:Which of the following would Rick Stevenson most probably agree with?
A.Modern technology is what we can’t live without.
B.Digital technology often falls short of our expectation.
C.Digital devices are more reliable than they used to be.
D.GPS error is not the only cause for Ceely’s accident.
小题4:In the writer’s opinion, Stevenson’s argument is _______.
A.one-sidedB.reasonable
C.puzzlingD.well-based
小题5:What is the real concern of the writer of this article?
A.The major causes of traffic accidents and car thefts.
B.The relationship between human and technology.
C.The shortcomings of digital devices we use.
D.The human unawareness of technical problems.

2016-05-16 | 0

[ 化学 ] 2002年诺贝尔化学奖授予瑞士科学家库尔特·芬恩,他的贡献是发明了“利用核磁共振技术测定有

2002年诺贝尔化学奖授予瑞士科学家库尔特·芬恩,他的贡献是发明了“利用核磁共振技术测定有机物分子结构”。在有机物分子中,不同的氢原子在质子核磁共振谱中给出的峰值(信号)不同,根据峰值(信号)可以确定有机物分子中氢原子的种类。下列有机物分子中,在质子核磁共振谱中只给出一种峰值(信号) [    ]
A.CH3OH
B.C(CH3)4
C.CH3COOH
D.CH3COOCH3

2016-05-16 | 0

[ 数学 ] 下列计算中,结果错误的是(    )A.a·a2=a3B.2x3-x3=x3C.(ab)2

下列计算中,结果错误的是(    )
A.a·a2=a3B.2x3-x3=x3C.(ab)2=ab2D.(-x)6÷(-x)2=x4

2016-05-18 | 0

[ 数学 ] 下表是1999年我国部分城市年平均气温统计情况 (1)根据表中的数据,制作统计图表示这六个

下表是1999年我国部分城市年平均气温统计情况
(1)根据表中的数据,制作统计图表示这六个城市年平均气温情况,你的统计图能画得形象些吗?
(2)如果要利用面积分别表示这六个城市的年平均气温,六个城市所占的面积之比大约是多少?(利用计算器计算)

2016-05-19 | 0

[ 数学 ] 如图,B、C、E三点在同一条直线上,AC∥DE,AC=CE,∠ACD=∠B.(1)求证:△

如图,B、C、E三点在同一条直线上,AC∥DE,AC=CE,∠ACD=∠B.
(1)求证:△ABC≌△CDE;
(2)若∠A=40°,求∠BCD的度数.

2016-05-19 | 0

[ 数学 ] 看一看,填一填.如图1所示,小飞用双手推动桌子向前移动,桌子的移动是______现象.如图

看一看,填一填.

如图1所示,小飞用双手推动桌子向前移动,桌子的移动是______现象.
如图2钟面上,分针、时针的移动是______现象.

2016-05-20 | 0

[ 数学 ] 在一张周长为24厘米的正方形硬纸板上,剪一个最大的圆,这个圆的半径是多少?

在一张周长为24厘米的正方形硬纸板上,剪一个最大的圆,这个圆的半径是多少?

2016-05-21 | 0

[ 数学 ] 在直角坐标系中,椭圆的参数方程为(为参数,).在极坐标系(与直角坐标系取相同的长度单位,且

在直角坐标系中,椭圆的参数方程为为参数,).在极坐标系(与直角坐标系取相同的长度单位,且以原点为极点,以轴正半轴为极轴)中,直线的极坐标方程为,若直线轴、轴的交点分别是椭圆的右焦点、短轴端点,则       .

2016-05-26 | 0

[ 英语 ] 根据句意及首字母提示完成单词。 1. Who is the c________ of th

根据句意及首字母提示完成单词。
1. Who is the c________ of the Chinese basketball team?  
2. Mr Liu is very funny. she often tells us j________ in class.
3. Please r________ to call me up when you get to Beijing.
4. Mrs.  Green is a little bit heavy. She wants to be t________.
5. Jackie Chan is a very p________ movie star in China. We all love his action movies.

2016-05-28 | 0