题目内容 (请给出正确答案)
[主观题]

4G is the fourth generation wireless technology adopted by the () and carriers around th

e worl

A.

B.IEEE

C.ISO

D.ITU

E.ETO

提问人:网友jsbfuture 发布时间:2022-01-06
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第1题
Once the 5G network is deployed, there will have r...

Once the 5G network is deployed, there will have really been five distinguishable generations of wireless phone (and now mobile device) technologies. The first generation (1G) refers to the original cellular networks of the early 1990s. The second generation (2G) began when wireless networks started allowing text messages to be sent. The third generation (3G) added the ability for people to access the internet on mobile devices. The fourth generation (4G) expanded upon the third generation's abilities, particularly in terms of increased speed.

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第2题
Questions 下列各 are based on the following passage. Amid a summer of record-setting he
at, a new survey fmds that most of Generation Xs (20世纪60年代到70年代初出生的美国人) young and middle-age adults are tminformed and unconcerned about climate change. Only about 5% of Gen Xers, now 32 to 52 years old, are "alarmed" and 18% "concerned" about climate change, reports the University of Michigans Institute for Social Research on Tuesday. Two-thirds, or 66% , of those surveyed last year said they arent sure global warming is happening and 10% said they dont believe its occurring. "Most Generation Xers are surprisingly disengaged, dismissive or doubtful about whether global climate change is happening and they dont spend much time worrying about it," said author Jon D.Miller. The report comes as several Obama administration officials have recently linked extreme weather to climate change. In a report last week, the National Oceanic and Atmospheric Administration cited six weather events last year and said that atmospheric changes caused by the burning of fossil fuels made Texas heat wave, for example, 20 times more likely than it would have been in the 1960s. The Generation X survey of about 3,000 adults, the fourth in a continuing series, found a small butstatistically significant decline in Gen Xers attention to climate change. In 2011, 16% said they followed the issue very or moderately closely, down from 2296 in 2009. Why are Gen Xere so indifferent? The report, funded by the National Science Foundation, citesclimate changes complexity, pressing economic concerns and "issue fatigue". It finds educated adults tend to be more concerned about the issue. It also finds partisan (党派的) differences; nearly half ofliberal Democrats were concerned or alarmed compared to zero percent of conservative Republicans. Miller said he expected that, given climate changes expected impact on future generations, parents of young children would be more concerned than those without kids. "Not so," he said. " Generation X adults without minor children were. slightly more alarmed aboutclimate change than were parents. The difference is small, but it is in the opposite direction than weexpected. " Miller said the report suggests that while theres broad awareness of climate change, manyGen Xers prefer to focus on more immediate issues such as jobs and schools. What do we know about the Generation X according to the passage?

A.They are a group of people receiving little education.

B.They dont believe global warming will affect them.

C.They dont care very much about climate change.

D.They never think that climate change will happen.

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第3题
基于公钥密码学的数字签名方案被定义为一个算法三元组(Gen,Sig,Ver),其中Gen是()。
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第4题
单词entschuldigen的重音在哪个音节?

A.ent-

B.-schul-

C.-di-

D.-gen

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第5题
The first paragraph intends to tell us that Gen Y-ers are______.A.spendthriftsB.brand-love

The first paragraph intends to tell us that Gen Y-ers are______.

A.spendthrifts

B.brand-lovers

C.well-protected children

D.informed consumers

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第6题
新版的AIP共包含三个部分,分别是A.总则GEN机场AD通信COMB.总则GEN航路ENR机场ADC.总则GEN机场AD

新版的AIP共包含三个部分,分别是

A.总则GEN机场AD通信COM

B.总则GEN航路ENR机场AD

C.总则GEN机场AD空中规则和空中交通服务RAC

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第7题
R.java文件存放在()目录中。

A.res

B.bin

C.src

D.gen

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第8题
【判断题】GenⅢ板颜色变为紫色,说明菌株能利用孔中的碳源
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第9题
堆的结构

Java堆的结构是什么样子的?什么是堆中的永久代(Perm Gen space)?

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