下列关于计算机软件的发展说法中,正确的是()。 A.高级语言程序出现在计算机软件发展

题型:单项选择题

问题:

下列关于计算机软件的发展说法中,正确的是()。

A.高级语言程序出现在计算机软件发展的初期

B.“软件危机”的出现是因为计算机硬件发展严重滞后

C.利用“软件工程”理念与方法可以编制高效高质的软件

D.上个世纪70年代为充分利用系统资源,产生了操作系统

考点:计算机科学技术计算机基础计算机基础题库
题型:单项选择题

见于巨幼细胞性贫血()

A.轻度皮肤黏膜出血伴骨髓增生低下,雄激素治疗有效

B.血小板数量减少伴巨核细胞成熟障碍

C.红系增生活跃,骨髓细胞外铁消失

D.维生素B12叶酸测定下降,骨穿示巨幼性改变

E.严重内脏出血伴三系血细胞下降,骨髓多部位增生极度低下,无巨幼细胞

题型:单项选择题

中国载人航天史上的首堂太空授课,于2013年6月20日上午10时开讲。在广州,有160多万中小学生在学校实时收看电视直播。学生们对于第一次上太空物理课,充满了好奇心和求知欲。“太空好奇妙啊!有机会我也想去太空走走。”授课结束后有同学还意犹未尽,对太空更是产生了无限的向往。请以此事为意,根据上联,补写出下联。(4分)

上联:赛婵娟太空授课科学魅力无限

下联:                                           

题型:单项选择题

属于艾滋病健康促进远期评价的内容是()

A.戒毒

B.HIV感染率降低

C.安全套使用率提高

D.受教育者的行为改变

E.艾滋病知识知晓率的改变

题型:单项选择题

It’s a cliche—but true—that a huge obstacle to a per economic recovery is the lack of confidence in a p recovery. If consumers and businesses were more confident, they would be spending, hiring and lending more freely. Instead, we’re deluged with reports suggesting that, because the recession was so deep, it will take many years to regain anything like the pre-crisis prosperity. Just last week, for example, the McKinsey Global Institute released a study estimating that the country needs 21 million additional jobs by 2020 to reduce the unemployment rate to 5 percent. The study was skeptical that this would happen. Pessimism and slow growth become a vicious cycle.

Battered confidence most obviously reflects the ferocity and shock of the financial collapse and the ensuing recession, including the devastating housing collapse. But there’s another, less appreciated cause: disillusion with modern economics. Probably without realizing it, most Americans had accepted the fundamental promises of contemporary economics. These were: First, we know enough to prevent another Great Depression; second, although we can’t prevent every recession, we know enough to ensure sustained and, for the most part, p recoveries. These propositions, endorsed by most economists, had worked themselves into society’s belief structure.

Embracing them does not preclude economic disappointments, setbacks, worries or risks. But for most people most of the time, it does preclude economic calamity. People felt protected. If you stop believing them, then you act differently. You begin shielding yourself, as best you can, against circumstances and dangers that you can’t foresee but that you fear are there. You become more cautious. You hesitate more before making a big commitment-buying a home or car, if you’re a consumer; hiring workers, if you’re an employer; starting a new business, if you’re an entrepreneur; or making loans, if you’re a banker. Almost everyone is hunkered down in some way.

One disturbing fact from the McKinsey report is this: The number of new businesses, a traditional source of jobs, was down 23 percent in 9,010 from 2007; the level was the lowest since 1983, when America had about 75 million fewer people. Large corporations are standoffish. They have about $2 trillion of cash and securities on their balance sheets, which could be used for hiring and investing in new products.

It’s not that economics achieved nothing. The emergency measures thrown at the crisis in many countries exceptionally low interest rates, "stimulus" programs of extra spending and tax cuts—probably averted another Depression. But it’s also true that there’s now no consensus among economists as to how to strengthen the recovery. Economists suffer from what one of them calls "the pretense-of-knowledge syndrome." They act as if they understand more than they do and presume that their policies, whether of the left or right, have benefits more predictable than they actually are. It’s worth remembering that the recovery’s present slowdown is occurring despite measures taken to speed it up.

So modern economics has been oversold, and the public is now disbelieving. The disillusion feeds stubbornly low confidence.

Were they more open-minded about economic calamities, people would()

A. take care not to trigger them in the first place

B. become more cautious in making purchase decisions

C. become less hesitant in economic activities

D. feel more protected from unforeseeable dangers

题型:单项选择题

如果计算机开机时出现提示信息”Drive not reday error Insert Boot Diskette in A,Pressany Key when ready。。。”,这时因为()所致。

A、软驱损坏

B、软驱中无软盘

C、CMOS中设置了软驱为第一启动盘、而软驱中无软盘

D、CMOS中设置了软驱为第一启动盘、而软驱中的软盘又不是启动盘

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