问题 单项选择题

左撇子的人比右撇子的人更经常患有免疫功能失调症,比如过敏。但是左撇子往往在完成由大脑右半球控制的任务上比右撇子具有优势,并且大多数人的数学推理能力都受到大脑右半球的强烈影响。
如果以上信息是正确的,最能推出下面哪个结论
Ⅰ.患有过敏或其他免疫功能失调症的人中,左撇子比右撇子多。
Ⅱ.在所有数学推理能力强的人当中左撇子的比例,高于所有数学推理能力弱的人当中左撇子的比例。
Ⅲ.在所有左撇子中,数学推理能力强的比例,高于数学推理能力弱的比例。( )

A.仅Ⅰ。

B.仅Ⅱ。

C.仅Ⅲ。

D.仅I和Ⅲ。

答案

参考答案:B

解析:

[分析]: Ⅰ不能从题干中推出。因为虽然左撇子的人比右撇子的人更经常患免疫功能失调症,但也许在整个人群中左撇子的绝对数量很小。因此即使他们全都患上免疫功能
失调症,也未必是个庞大的数字。
Ⅱ能够从题干中推出。因为否则的话,题干中所表达的左撇子比右撇子在数学上有优势的观点就不成立了。
Ⅲ不能从题干中推出。因为题干中所给出的,是关于左撇子和右撇子相比较而得出的一些信息,而Ⅲ则是关于左撇子人群内部的信息,显然不能从题干中推出。
所以,选项B是正确答案。

单项选择题 A3/A4型题
单项选择题

"This is a really exciting time—a new era is starting," says Peter Bazalgette, the chief creative officer of Endemol, the television company behind "Big Brother" and other popular shows. He is referring to the upsurge of interest in mobile television, a nascent industry at the intersection of telecoms and media which offers new opportunities to device-makers, content producers and mobile- network operators. And he is far from alone in his enthusiasm.

Already, many mobile operators offer a selection of television channels or individual shows, which are " streamed" across their third-generation (3G) networks. In South Korea, television is also sent to mobile phones via satellite and terrestrial broadcast networks, which is far more efficient than sending video across mobile networks; similar broadcasts will begin in Japan in April. In Europe, the Italian arm of 3, a mobile operator, recently acquired Canale 7, a television channel, with a view to launching mobile-TV broadcasts in Italy in the second half of 2006. Similar mobile-TV networks will also be built in Finland and America, and are being tested in many other countries.

Meanwhile, Apple Computer, which launched a video-capable version of its iPod portable music-player in October, is striking deals with television networks to expand the range of shows that can be purchased for viewing on the device, including "Lost", "Desperate Housewives" and "Law & Order". TiVo, maker of the pioneering personal video recorder (PVR), says it plans to enable subscribers to download recorded shows on to iPods and other portable devices for viewing on the move. And mobile TV was one of the big trends at the world’s largest technology fair, the Consumer Electronics Show, which took place in Las Vegas this week.

Despite all this activity, however, the prospects for mobile TV are unclear. For a start, nobody really knows if consumers will pay for it, though surveys suggest they like the idea. Informa, a consultancy, says there will be 125 million mobile-TV users by 2010. But many other mobile technologies inspired high hopes and then failed to live up to expectations. And even if people do want TV on the move, there is further uncertainty in three areas: technology, business models and the content itself.

It can be inferred from the last paragraph of the text that()

A. mobile TV is coming—but how the market will develop is still unclear

B. consumers favor mobile TV if they need not pay for it

C. few mobile technologies failed to live up to expectations

D. the three uncertainties referred to at the end of the text are hopefully overcome in no time