搜题请搜索小程序“爱下问搜题”
问题 选择题

Every student in our calls is looking forward to ______a good future.

A．have

B．had

C．has

D．having

答案

答案：D

look forward to doing sth，表示盼望做某事，故选答案为D

单项选择题

通常，有效提示会促进加工，然而，外周提示之后延迟300ms或更长时间，那一位置的目标觉察，不仅没有受到促进，反而变慢，这种效应称作（）

A．心理不应期

B．负启动

C．负启动反转

D．返回抑制
查看答案
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
查看答案