若a=(2,3)与b=(-4,y)共线,则y=______.

题型:填空题

问题:

a
=(2,3)
b
=(-4,y)
共线,则y=______.
考点:平面向量基本定理及坐标表示
题型:填空题

在直流控制保护系统中,CAN总线允许的最大节点数是()。

A.128

B.256

C.512

D.1024

题型:填空题

某早产儿胎龄为30周,因生后"进行性呼吸困难25分钟"入院。考虑存在新生儿呼吸窘迫综合征,给予呼吸机辅助呼吸。

针对该问题的治疗方案为()

A.间断停氧,必要时采用药物治疗

B.加强脑功能训练

C.加强营养支持,促进体重增长

D.无需特殊治疗

E.高压氧治疗

题型:填空题

流脑区别于化脓性脑膜炎患者的是()

A.体温增高程度的不同

B.意识障碍程度的不同

C.血中性粒细胞增高的程度不同

D.有否皮肤瘀点、瘀斑

E.脑脊液细胞数的不同

题型:填空题

阅读理解。

     People in China are among the  most fearful of getting old, a new global survey suggests.

     According to Bupa, a British healthcare organization, which asked 12262 people in 12

countries about their attitudes toward aging, 28  percent of the Chinese polled said they feel

depressed when they think about getting old.

     And although 72 percent of all respondents aged 65 and over  said they do not feel old,

the survey conducted in June and July this year found more than half of those aged 45 to 54

in China already consider themselves to be elderly. About 30 percent  of Chinese respondents

said they worry about who will look after them in later years, while 91 percent agreed the

government of the world's most populous nation  should improve care for the elderly.

     However, because people in China think about their future earlier, research suggests the

country could be one of the best prepared for addressing the aging problem. About one third

of Chinese respondents--more than double the global average-said they have put money aside

for retirement, while 46 percent have taken out insurance, the poll showed. Despite being one

of the best prepared nations, three fifths of those surveyed in China expect their family to care

for them when they can no longer do so themselves.

     A Bupa-sponsored report,however, revealed that the "informal care network"  (the traditional

pattern of families looking after the elderly) is disintegrating. This is due to a number of factors,

said the report, including structural changes to the population, the increase of women in employment,

the increase of one-person households and the rise in divorce rates.

     The first batch of Chinese couples with only one child are largely in their 50s or 60s because the

country's family planning policy was adopted in the late 1970s.

     Li Yinping, 55, a retired accountant, said she thinks only people in their 70s can be called old.

She said her pension is enough to support her in later years and that her only hope is that her son

can visit regularly. "I don't worry about my later years at all," said Li. "When I'm old, I can turn to a

rest home. The local hospital can deliver the medicine I need with just a phone call."

     Xiao Zhe, a 26-year-old computer engineer in Beijing, is an only child whose parents live in his

hometown of Chongqing. "I'm so busy with my work that I can't go back to visit them often," he said.

"When they're not able to care for themselves, I will hire a nurse to look after them."

     China will become the oldest society in the world by 2030, according to a recent report by a

Beijing-based government think tank. The United Nations also forecasts that people aged 60 and

over will account for 28 percent of the country's total population by 2040.

1. Which of the following can be best title of the passage? ________.

A. the Aging problem of China    

B. Who is to look after the elders

C. Chinese are afraid of getting old

D. Old Home Is Popular in China

2. Many factors EXCEPT _______ have a great impact on informal care network.

A. structural changes to the population

B. the increase of women in employment

C. the development of economy

D. the rise in divorce rates

3. According to the passage, most Chinese people are ________ to guarantee the late life. 

A. putting away some money

B. giving birth to more children

C. hiring a nurse

D. turning to a rest home

4. What can be inferred from the last four paragraphs? ________ 

A. Chinese government put forward family planning policy in the late 1970s.

B. Senior citizens will account for a high percentage of the country's total population by 2040.

C. The local hospital can deliver the medicine to senior citizens in need.

D. There is a trend that grown-up children live apart from parents

题型:填空题

在OSI七层模型中,处于数据链路层与传输层之间的是()。

A.物理层

B.网络层

C.会话层

D.表示层

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