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3、对于双组分液体连续精馏过程,要达到规定的分离要求所需要的理论板数NT和下列诸因素中无关的因素是()
A.回流比B.塔内操作压强C.塔板上的气液接触状况D.加料的热状态
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拱脚以及边墙基底以上lm范围内的超挖，宜用（）级混凝土同时灌筑。
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What kind of job did you do? ( ).(本题3.5分)
A、 worked at a bookstore on campus.
B、 Yes. I brewed coffee in the Student Union.
C、 But selling books was satisfying.
D、 I need to earn the money.
A、 worked at a bookstore on campus.
B、 Yes. I brewed coffee in the Student Union.
C、 But selling books was satisfying.
D、 I need to earn the money.
2、流体流动的连续性方程u1A1=u2A2适用于(____)的流体,它是(____)原理在化学工程中的应用。
People are being lured(引诱）onto Facebook with the promise of a fun, free service, without realizing they’re paying for it by giving up loads of personal information. Facebook then attempts to make money by selling their data to advertisers that want to send targeted messages.
Most Facebook users don’t realize this is happening. Even if they know what the company is up to, they still have no idea what they’re paying for Facebook, because people don’t really know what their personal data is worth.
The biggest problem, however, is that the company keeps changing the rules. Early on, you could keep everything private. That was the great thing about Facebook D you could create your own little private network. Last year, the company changed its privacy rules so that many things D your city, your photo, your friends’ names D were set, by default(默认）, to be shared with everyone on the Internet.
According to Facebook’s vice-president Elliot Schrage, the company is simply making changes to improve its service, and if people don’t share information, they have a “less satisfying experience.”
Some critics think this is more about Facebook looking to make more money. Its original business model, which involved selling ads and putting them at the side of the page, totally failed. Who wants to look at ads when they’re online connecting with their friends?
The privacy issue has already landed Facebook in hot water in Washington. In April, Senator Charles Schumer called on Facebook to change its privacy policy. He also urged the Federal Trade Commission to set guidelines for social-networking sites. “I think the senator rightly communicated that we had not been clear about what the new products were and how people could choose to use them or not to use them,” Scrage admits.
I suspect that whatever Facebook has done so far to invade our privacy, it’s only the beginning. Which is why I’m considering deactivating(撤销）my account. Facebook is a handy site, but I’m upset by the idea that my information is in the hands of people I don’t trust. That’s too high a price to pay..
(1). (单选题) What do we learn about Facebook from he first paragraph?( )(本题2.0分)
A、 It is a website that sends messages to targeted users.
B、 It makes money by putting on advertisements.
C、 It provides loads of information to its users.
D、 It profits by selling its users’ personal data.
(2). (单选题) What does the author say about most Facebook users?( )(本题2.0分)
A、 They care very little about their personal information.
B、 They are reluctant to give up their personal information.
C、 They don’t know their personal data enriches Facebook.
D、 They don’t identify themselves when using the website.
(3). (单选题) Why does Facebook make changes to its rulers according to Elliot Schrage?( )(本题2.0分)
A、 To conform to the Federal guidelines.
B、 To improve its users’ connectivity.
C、 To render better service to its users.
D、 To expand its scope of business.
(4). (单选题) What does Senator Charles Schumer advocate?( )(本题2.0分)
A、 Setting guidelines for advertising on websites.
B、 Formulating regulations for social-networking sites.
C、 Banning the sharing of users’ personal information.
D、 Removing ads from all social-networking sites.
(5). (单选题) Why does the author plan to cancel his Facebook account?( )(本题2.0分)
A、 He finds many of its users untrustworthy.
B、 He is upset by its frequent rule changes.
C、 He doesn’t want his personal data abused.
D、 He is dissatisfied with its current service.
Most Facebook users don’t realize this is happening. Even if they know what the company is up to, they still have no idea what they’re paying for Facebook, because people don’t really know what their personal data is worth.
The biggest problem, however, is that the company keeps changing the rules. Early on, you could keep everything private. That was the great thing about Facebook D you could create your own little private network. Last year, the company changed its privacy rules so that many things D your city, your photo, your friends’ names D were set, by default(默认）, to be shared with everyone on the Internet.
According to Facebook’s vice-president Elliot Schrage, the company is simply making changes to improve its service, and if people don’t share information, they have a “less satisfying experience.”
Some critics think this is more about Facebook looking to make more money. Its original business model, which involved selling ads and putting them at the side of the page, totally failed. Who wants to look at ads when they’re online connecting with their friends?
The privacy issue has already landed Facebook in hot water in Washington. In April, Senator Charles Schumer called on Facebook to change its privacy policy. He also urged the Federal Trade Commission to set guidelines for social-networking sites. “I think the senator rightly communicated that we had not been clear about what the new products were and how people could choose to use them or not to use them,” Scrage admits.
I suspect that whatever Facebook has done so far to invade our privacy, it’s only the beginning. Which is why I’m considering deactivating(撤销）my account. Facebook is a handy site, but I’m upset by the idea that my information is in the hands of people I don’t trust. That’s too high a price to pay..
(1). (单选题) What do we learn about Facebook from he first paragraph?( )(本题2.0分)
A、 It is a website that sends messages to targeted users.
B、 It makes money by putting on advertisements.
C、 It provides loads of information to its users.
D、 It profits by selling its users’ personal data.
(2). (单选题) What does the author say about most Facebook users?( )(本题2.0分)
A、 They care very little about their personal information.
B、 They are reluctant to give up their personal information.
C、 They don’t know their personal data enriches Facebook.
D、 They don’t identify themselves when using the website.
(3). (单选题) Why does Facebook make changes to its rulers according to Elliot Schrage?( )(本题2.0分)
A、 To conform to the Federal guidelines.
B、 To improve its users’ connectivity.
C、 To render better service to its users.
D、 To expand its scope of business.
(4). (单选题) What does Senator Charles Schumer advocate?( )(本题2.0分)
A、 Setting guidelines for advertising on websites.
B、 Formulating regulations for social-networking sites.
C、 Banning the sharing of users’ personal information.
D、 Removing ads from all social-networking sites.
(5). (单选题) Why does the author plan to cancel his Facebook account?( )(本题2.0分)
A、 He finds many of its users untrustworthy.
B、 He is upset by its frequent rule changes.
C、 He doesn’t want his personal data abused.
D、 He is dissatisfied with its current service.
尽量不要把隧道中线设计成与软弱结构面的走向一致或平行，要正交或有成一定的交角
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