下列事例中,能增大摩擦的是[ ] A、科学家设计磁悬浮列车悬浮行驶 B、厂家给旅

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问题:

下列事例中,能增大摩擦的是[ ]

A、科学家设计磁悬浮列车悬浮行驶

B、厂家给旅行箱底部装上轮子

C、小明往生锈的锁孔中加润滑油

D、羽坛名将林丹比赛时在手上抹镁粉

考点:影响摩擦力大小的因素
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三百二十七万零一十写作______,省略万位后的尾数约是______.

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下列各句中,语意明确的一句是(  )

A.老师看见我们非常高兴,就留我们在他家吃便饭。

B.市场经济的大潮推动了文艺事业的发展,许多作曲家、画家和其他优秀的文艺工作者都创作出人民群众喜闻乐见的优秀作品。

C.这个观点,最近报刊上提出了一些异议,我认为是正确的。

D.在校运动会开幕式上,校长和分管体育的副校长以及学校的其他领导8人一起坐在 * * 台上。

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工程项目目标系统表现为一个()结构。

A.递阶层次

B.多目标的平行

C.完整的封闭

D.开放的并列

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Will humans always be superior to machines

This statement actually consists of a series of three related claims: (1) machines are tools of human minds; (2) human minds will always be superior to machines; and (3) it is because machines are human ’tools that human minds will always be superior to machines. While I concede the first claim, whether I agree with the other two claims depends partly on how one defines "superiority," and partly on how willing one is to humble oneself to the unknown future scenarios.

(41) After all, would any machine even exist unless a human being invented it Of course not. Moreover, I would be hard-pressed to think of any machine that cannot be described as a tool. Even machines designed to entertain or amuse us—for example, toy robots, cars and video games, and novelty items—are in fact tools, which their inventors and promoters use for engaging in commerce and the business of entertainment and amusement.

(42) And, the claim that a machine can be an end in itself, without purpose or utilitarian function for humans whatsoever, is dubious at best, since I cannot conjure up even a single example of any such machine.

(43) As for the statement’s second claim, in certain respects machines are superior. We have devised machines that perform number-crunching and other rote cerebral tasks with greater accuracy and speed than human minds ever could. However, if one defines superiority not in terms of competence in performing rote tasks but rather in other ways, human minds are superior. Machines have no capacity for independent thought, for making judgments based on normative considerations, or for developing emotional responses to intellectual problems.

(44)Up until now, the notion of human-made machines that develop the ability to think on their own, and to develop so-called "emotional intelligence," has been pure fiction. Besides, even in fiction we humans ultimately prevail over such machines—as in the cases of Frankenstein’s monster and Hat, the computer in 2001: A Space Odyssey. Yet it seems presumptuous to assert with confidence that humans will always maintain their superior status over their machines. In other words, machines will soon exhibit the traits to which we humans attribute our own superiority.

(45) And insofar as humans have the unique capacity for independent thought, subjective judgment, and emotional response, it also seems fair to claim superiority over our machines. Besides, should we ever become so clever a species as to devise machines that can truly think for themselves and look out for their own well-being, then query whether these machines of the future would be "machines" anymore.

[A] Recent advances in biotechnology, particularly in the area of human genome research, suggest that within the twenty-first century we’ll witness machines that can learn to think on their own, to repair and nurture themselves, to experience Visceral sensations, and so forth.

[B] The statement is clearly accurate insofar as machines are tools of human minds.

[C] In sum, because we devise machines in order that they may serve us, it is fair to characterize machines as "tools of human minds."

[D] It’s hardly surprising that human-made machine can do the most works that belong to human before.

[E] In fact, it is because we can devise machines that are superior in these respects that we devise them--as our tools—to begin with.

[F] When we develop any sort of machine we always have some sort of end in mind—a purpose for that machine.

45()

题型:选择题

建筑安全技术

钢管应采用符合现行国家标准《直缝电焊钢管》(GB/T13793)或《低压流体输送用焊接钢管》(GB/T3092)中规定的3号普通钢管。钢管的尺寸应按标准选用,最好采用()的钢管。

A.48×3.5mm

B.51×3mm

C.48×3mm

D.51×3.5mm

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