引起被调参数偏离给定值的各种因素称()。A.调节 B.扰动 C.反馈 D.给定

题型:单项选择题

问题:

引起被调参数偏离给定值的各种因素称()。

A.调节

B.扰动

C.反馈

D.给定

考点:计算机科学技术DCS分布式控制系统DCS分布式控制系统题库
题型:单项选择题
计算:
(1)|
5
-
6
|+2
5

(2)(-
2
)2
+
3-
125
8
题型:单项选择题

关于玉米生长发育过程的叙述,正确的是(    )

A.在适宜的外界条件下,种下去的玉米种子就会萌发

B.在萌发时,玉米的子叶会包裹着胚芽出土

C.一粒玉米种子实质就是一个果实

D.玉米种子中的胚芽先进行萌发,形成茎和叶

题型:单项选择题

出现“三偏”征,常见的病变部位是

A.内囊

B.深皮质

C.脑干

D.脊髓

E.基底节

题型:单项选择题

Women are now as likely to use the Internet as men—about two-thirds of both genders, yet a new study shows that gaps remain in what each sex does online.

American men who go online are more likely than women to check the weather, the news, sports, political and financial information, the Pew Internet and American Life Project reported Wednesday. They are also more likely to use the Internet to download music and software and to take a class.

Online women, meanwhile, are bigger users of e-mail, and they are also more likely to go online for religious information and support for health or personal problems.

“For men, it’s just, ‘give me the facts,’” said Deborah Fallows, who wrote the report based on six years of Pew surveys, “For women, its ‘Let’s talk about this. Are you worried about this problem?’ It’s keeping in touch and connecting with people in a richer way.”

About two- thirds of the 6,403 adults surveyed by Pew during 2005 said they use the Internet. By gender, it was 68%of the male respondents, and 66%of the female participants---a statistically insignificant(不重要的)difference given the study’s margin of sampling error of plus or minus 2%points. In 2002, by contrast, the gap was slightly larger: 61%vs. 57%.

The surveys find that for many activities, such as getting travel information or looking up a phone number, men and women are equally likely to use the Internet.

小题1: According to the passage, which of the following is not what American men who go online do?

A.Checking the weather and the news.

B.Searching for religious information.

C.Downloading some music.

D.Taking a class.小题2: What is the probable meaning of the sentence “gaps remain in what each sex does online”?

A.There are some difference between men and women in the US.

B.There is a slight difference between the numbers of men and women online in the US.

C.Men and women in the US have difference tastes about what they do online.

D.Men and women in the US have difference way of surfing the Internet.小题3:Which of the following statements is true according to the passage?

A.A small part of women in the US go on line today.

B.Women in the US going on line are only concerned with personal problems.

C.Men are still more likely to use the Internet than women.

D.The gap between both sexes going online in 2002 was slightly larger than that in 2005.小题4: What’s the author’s purpose of writing the article?

A.To tell us the different aims of men and women in the US who go online.

B.To show why men and women are equally likely to use the Internet.

C.To teach us how to surf the Internet.

D.To offer us some information of both sexes’ going online in the US.

题型:单项选择题

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