Most small earthquakes which cause very slight （ ） can only be detected with the help of sophisticated instruments.
A.signals B.rotations C.passages D.vibrations
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73. 5 percent of major U.S. firms report that they record and review their employees' communications and activities on the joB.The larger the company, the more likely it is to engage in monitoring and surveillance activities, according to a survey. Broken down by business category, survey respondents in the financial services sector lead the packs when it comes to monitoring their employees e-mail and Internet connections.Weber says he sees companies go through a "life cycle" with their Internet experience. When they first get connected, companies see a surge of activity and an immediate drop-off in productivity. After about two or three weeks, Internet use levels off, Weber notes. Weber observes that among his clients, he's seeing a trend where employers are letting the life cycle run its course. In other cases, Weber says his clients are capturing the information, but not really doing anything about it. One thing the experts all agree on is that if you use the Internet and provide access to your employees, you should have a policy in place that defines what you deem to be permissible use by employees. Weber believes that no company wants to be in the rote of Big Brother, but still must protect one of its most valuable assets. Nor are employers looking to micro-manage their employees. Many companies are viewing use of the Internet as similar to the phone, and operating with the philosophy that incidental personal use is okay. "But some clients don't see a need to restrict access," he explains. For certain the issues that surround monitoring employee Internet use aren't going to quiet down anything soon, the experts say. "Maybe the simplest solution is to just allow a certain percentage to go to employee use."1.In monitoring the Internet use of the employees, which of the following take the lead?2.Which of the following may rightly describe the lifecycle of Internet use（ ）3.What can we say about most companies' attitude t
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