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用于DIC的早期诊断对下列疾病检查有意义的试验（）
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Passage TwoQuestions 66 to 70 are based on the following passage:Eye contact is nonverbal (非语言的) technique that helps the speakers “sell” their ideas to an audience. Besides its persuasive powers, eye contact helps hold listeners’ interest. A successful speaker must maintain eye contact with an audience. To have good relation with listeners, a speaker should maintain direct eye contact for at least 75 percent of the time. Some speakers focus only on their notes. Others look over the heads of their listeners. Both are likely to lose audience’s interest and respect. People who maintain eye contact while speaking, whether from a podium or from across the table, are regarded not only as exceptionally friendly by their target but also as more believable and earnest.To show the power of eye contact in daily life, we have only to consider how passers-by behave when their glances happen to meet on the street. At one extreme are those people who feel obliged to smile when they make eye contact. At the other extreme are those who feel uncomfortable and immediately look away. To make eye contact, it seems, is to make a certain link with someone.Eye contact with an audience also lets a speaker know and monitor (观察) his listeners. It is, in fact, essential to analyze an audience during a speech. Visual feedback (视觉反馈) from the audience can indicate that a speech is boring, that the speaker is talking too much about a particular point, or that a particular point requires further explanation. As we have pointed out, visual feedback from listeners should play an important role in shaping a speech as it is delivered. What does the writer believe about a speaker’s eye contact
用高级语言编写的程序一般标为（），它不能在机器上直接执行，需要经过编译后得到用机器语言表示的目标程序，才能在机器上直接执行。
关系代数是关系操纵语言的一种传统表示方式，它以集合代数为基础，它的运算对象和运算结果均为（）。
Twenty years ago, kids in school had never even heard of the Internet. Now, I’ll bet you can’t find a single person in your school who hasn’t at least heard of it. (76) In fact, many of us use it on a regular basis and even have access to it from our homes! The “net” in Internet really stands for network. A network is two or more computers connected together so that information can be shared, or sent from one computer to another. The Internet is a vast resource for all types of information. (77) You may enjoy using it to do research for a school project, downloading your favorite songs or communicating with friends and family. Information is accessed through web pages that companies, organizations and individuals create and post. It’s kind of like a giant bulletin board (布告牌) that the whole world uses! (78) But since anyone can put anything on the Internet, you also have to be careful and use your best judgment and a little common sense.Just because you read something on a piece of paper someone sticks on a bulletin board doesn’t mean it’s good information, or even correct, for that matter. So you have to be sure that whoever posted the information knows what they’re talking about, especially if you’re doing research! But what if you’re just emailing people You still have to be very careful. (79) If you’ve never met the person that you’re communicating with online, you could be on dangerous ground! You should never give out any personal information to someone you don’t know, not even your name! And just like you can’t believe the information on every website out there, you can’t rely on what strangers you “meet” on the Internet tell you either. (80) Just like you could make up things about yourself to tell someone, someone else could do the same to you!76.77.78.79.80. In fact, many of us use it on a regular basis and even have access to it from our homes!
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