问题 填空题

为了从用户菜单返回到默认的系统菜单应该使用命令SET【 】TO DEFAULT。

答案

参考答案:SYSMENU

解析:不带参数的SET SYSMENU TO命令,将屏蔽系统菜单,使菜单不可用。其中TO DEFAULT将系统菜单恢复为缺省的配置;SAVE参数将当前的系统菜单配置指定为缺省配置;NOSAVE参数将缺省配置恢复成Visual FoxPro系统菜单的标准配置。

阅读理解

根据短文内容,从下框的A—F选项中选出能概括每一段主题的最佳选项。选项中有一项为多余选项。

A. Environment protection

B. Driving experience

C. Self – driving

D. Safety

E. Computing and communications

F. Wireless communications

小题1:

Today, the Internet is in a few cars; tomorrow, broadband (宽带) will be in all of them. Any capability a personal computer has, a car will have, including two – way wireless communications for receiving e – mail, music, and movies. When you’re crossing the lonely place, the kids can watch TV if they’re bored. Every passenger will have a video feed.

小题2:

Every car will have a self – driving system linked to GPS satellites. Radar sensors (传感器) will track nearby cars. On the freeway, they’ll slow your car when the car ahead of you slows; in town, they’ll help you park without hitting other cars. At rush hour, you’ll get the routes around traffic jams and accidents. The self – driving system in a car makes it possible for the car to drive itself, though some scientists say that’s 30 to 40 years off.

小题3:

Motor vehicles today represent 20 to 30 percent of the world’s energy use. In the near future, a small gasoline engine and an electric motor will be brought together. Drivers will use electricity in a storage battery for short distances. Longer term, cars might burn hydrogen or use a fuel cell that converts a fuel like hydrogen and combines it with oxygen to create power. Then the waste will be pure water.

小题4:

You’ll use the voice control: “Make it a bit cooler” or “find me country music”. Lighter, more reliable electronic controls replace mechanical controls. Fiber optics (光纤) replace electrical wires and light bulbs. Seats will be air – conditioned. The car will travel with one side higher than the other when turning, just as an airplane does now.

小题5:

Cars will avoid some accidents by maintaining safe following distances, and by sensing sleepy or drunk drivers. Air bags will adapt for every passenger according to their size, weight, and position in case accidents happen.

单项选择题