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问题 单项选择题

由国际收支失衡引起的国内经济变量变动对国际收支的反作用过程，我们称为（）。

A.政策调节机制

B.自动调节机制

C.国际资本自由流动

D.国际直接投资的作用

答案

参考答案：B

单项选择题

螺旋式千斤顶的齿磨损达多少时，禁止使用。 （）

A、10%

B、20%

C、30%
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单项选择题

Personal firewall is a technology that helps______intruders from accessing data on your PCvia the Internet or another network, by keeping______data from entering or exiting your system.
Hackers do not just target national security organizations for______: They want your taxreturns, network passwords, or bank account numbers. And you do not want the FBI kicking in yourdoor because someone hijacked your PC to______in the latest denial-of-service attack on theInternet. Now that "always-on" broadband connections such as cable modems and digital subscriberline are becoming more popular, home users are at risk. Fortunately, you can protect your data.Firewalls can block______ attacks and protect your PC from outside threats.

A．authorized

B．refused

C．denied

D．unauthorized
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