信源的消息通过信道传输后的误差或失真越大道传输消息所需的信息率()。

题型:填空题

问题:

信源的消息通过信道传输后的误差或失真越大道传输消息所需的信息率()。

考点:计算机科学技术信息论与编码信息论与编码题库
题型:填空题

下列关于我国现行宪法的结构体系的表述中哪一项是正确的( )

A.序言,总纲,国家机构,公民的基本权利和义务,国旗、国徽和首都

B.序言,总纲,国家机构,公民的基本权利和义务,国家象征

C.序言,总纲,公民的基本权利和义务,国家机构,国旗、国歌、国徽、首都

D.总纲,国家机构,公民的基本权利和义务,国旗、国歌、国徽、首都

题型:填空题

阅读《论语》中的几段文字,然后回答问题。(5分)

子贡问曰:“乡人皆好之,何如?”子曰:“未可也。”“乡人皆恶之,何如?”子曰:“未可也。不如乡人之善者好之,其不善者恶之。”

子曰:“乡愿,德之贼也。”

23、(1)在孔子看来,应当怎样正确评价一个人?试用自己的话加以概括。(2分)

(2)为什么孔子视“乡愿”之人为“德之贼”?(3分)       

题型:填空题

阅读理解。

     For all the dinner table, a glass of milk seems to be a constant, at least it was when I was growing up.

It was widely believed that milk was integral in building strong bones and teeth. There's no doubt that

dairy products (乳制品), and milk in particular, are high in protein and calcium, and most milk products

are supplemented with Vitamin D and A.

     While it's well known that our bones need calcium, some studies suggest that high calcium intake

doesn't necessarily lower a person's risk for fractures (骨折). A Harvard study found that people who

drank two or more glasses of milk had no greater protection from breaking a bone than those who drank

a glass or less a week.

     There's no doubt that we need calcium. Some anti-dairy supporters claim that dairy can lead to heart

disease. Much of this claim is based on high fat and high dairy products, like cheeses and creams, which

may indeed contribute to cardiovascular problems. Some studies have linked high milk intakes with a risk

of prostate cancer; this seems to be caused by high-fat dairy products, not dairy in general.

     Although milk was always regarded as one of the most important thing we need for our bones, yet

least promoted, factors involved in strengthening bones. Perhaps we should think of dairy as less like a

nutrient and more like a food. If you like it, eat it. If not, find some others. Because some claims may not

be completely true, when I eat a cream, I'm not thinking about calcium, protein, or any such thing I'm

thinking delicious.

1. Which of the following is TRUE on the milk?

A. The more milk you drink, the more risk for fractures you might be.

B. The more milk you drink, the less risk for fractures you might be.

C. The less milk you drink, the less risk for fractures you might be.

D. There is no link between them.

2. Some anti-dairy supporters claim that dairy can lead to except _________.

A. cardiovascular problems

B. heart disease

C. prostate cancer

D. stomach cancer

3. The underlined words "some others" in the last paragraph refer to _________.

A. dairy products      

B. milk

C. food

D. cream

4. What's the author's attitude towards milk?

A. He doesn't like milk any more.  

B. He used to drink milk as a child.

C. He regards milk as a nutrient.      

D. He always cares about calcium, protein when he eats something.

5. We can learn from the text that _________.

A. All the claims are not completely true.      

B. High milk intakes can lead to cancer.

C. It's necessary for you to reduce milk intakes.    

D. Give up milk for your health.

题型:填空题

甲型肝炎病毒(HAV)归属于()

A.嗜肝DNA病毒属

B.嗜肝RNA病毒属

C.肠道病毒属72型

D.嵌杯病毒科

E.黄病毒科

题型:填空题

患儿,女,10岁。阵发性右上腹绞痛,伴恶心呕吐,腹部平软。用特定穴治疗,应首选

A.原穴
B.络穴
C.背俞穴
D.郄穴
E.下合穴

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