在VHDL中，可以用语句（）表示检测clock下降沿。
A:clock’event B:clock’eventandclock=’1’ C:clock=’0’ D:clock’eventandclock=’0’
Passage Five
There’re only 800 people in Fairfield, and most of them do the same thing at the same time every week day. Every morning, Monday through Friday, when the big clock strikes seven, old Bruce Hunt walks past the Farmers’ Bookshop. He’s on his way to work at the bus-station. And when Bruce walks ’past the book shop, Robert Brown opens his shop next door and waves to Bruce. When Robert waves to Bruce, you can set your watch and you know it’s seven.
If you miss Bruce and Robert, you can set your watch when Miss Mary Smith opens the door of the post office. You know it’s seven fifty-five. She has five minutes to get ready for work--to put away her raincoat and take off her hat and coat. Rain or shine, Miss Mary Smith brings raincoat. "You never can tell what the weather will be like when it’s time to go home," she always says.
One after another the shops along Main Street open for the day. The clothes shop and the fruit shop get open for business. When Mr. King opens the bookshop, the clock above the shop strides nine.
But every weekday, people go to bed early in Fairfield. The streets are quiet, and the houses are dark when the big clock over the Farmers’ Bookshop strikes ten o’clock. The small town is getting ready for tomorrow.
Choose the best title for this passage.（）
A:A Small Town. B:Life in a Small Town. C:Shops in a Small Town. D:A Clock in a Small Town.
We will {{U}}set off{{/U}} after he finishes packing.
A:set out B:set back C:set up D:set down
? ?下面有3篇短文，每篇短文后有5道题。请根据短文内容，为每题确定1个最佳选项。
{{B}}第一篇{{/B}}
{{B}}? ? ? ? ? ?
?The Clock That Wakes You When You Are Ready{{/B}}
? ?Are you a
real grump (脾气坏的人) in the mornings? Do you wake up every day feeling tired,
angry and upset, and all too ready to hit the snooze (瞌睡) button? If so, then a
new alarm clock could be just for you.
? ?The clock, called
SleepSmart, measures your sleep cycle, and waits for you to be in your lightest
phase of sleep before waking you up. Its makers say that should ensure you wake
up feeling refreshed (恢复精力) every morning.
? ?As you sleep you pass
through a sequence of sleep states - light sleep, deep sleep and REM sleep
(快速眼动睡眠) - that repeats approximately every 90 minutes. The points in that cycle
at which you wake can affect how you feel later, and may even have a greater
impact than how long or little you have slept. Being wakened during a light
phase means you are more likely to wake up cheerful and full of life and
interest.
? ?SleepSmart records the distinct pattern of brain waves
produced during each phase of sleep, via a headband equipped with electrodes
(电极) and a microprocessor. This measures electric activity of the wearer’s
brain, and communicates wirelessly with a clock unit near the bed. You program
the clock with the latest time at which you want to be wakened, and it then at
the proper time wakes. you during the last light sleep phase before
that.
? ?The concept was invented by a group of students at Brown
University in Rhode Island after a friend complained of waking up tired and
performing poorly on a test. "As sleep-deprived (剥夺) people ourselves, we
started thinking of what to do about it," says Eric Shashoua, a recent college
graduate and now chief executive officer of Axon Sleep Research Laboratories, a
company created by the students to develop their idea. They have almost finished
a prototype and plan to market the product by next
year. |
What should the sleeper do to make the device work?
A:He should press the snooze button in time. B:He should turn on the microprocessor in the clock. C:He should set the latest time for waking up. D:He should adjust his headband.
The ClockThat Wake Yozf When You Are Ready
Are you a teal grump(脾气坏的人)in the mOITIings?Do you wake up every day feeling tired，angry aJld up8et，and all too ready to flit the Snooze(瞌睡)button?If so，then a new alarnl clock COilld be just for you．The c10ck，called S1eepSmart，measures your sleep cycle，and waits for you t0 be in your lightest phase of sleep before waking you up，Its makers say that should ensure you wake up feeling refreshed(恢复精力) every moiTling．
As you sleep you paSS through a sequence of aleep states—light sleep，deep sleep and REM sleep(快速眼动睡眼)一that repeats approximately every 90 minutes．The points in that cycle at which you wakeear affect hOW you feellater，aJld may even have a greater impact th．衄hOW 10ng or little you have slept．Being wakened during a light phase means you are more 1ikely t0 wake up cheefful and full 0f life and interest．
SleepSmart records the distinct pattern 0f bmin waves pmdueed during each phase of sleep，Via a head baJld equipped with electrodes(电极)and a mieroprocessor．This measures electric actiVity of the weare’s brain，and eommunicates wirelessly with a clock unit near the bed．You program the clock with the latest time at which vou Wallt t0 be wakened，and it then at the pIDper time wakes you during the 1ast light sleep phase before that．
The concept was invented by a group 0f students at Brown Universl‘ty in Rhode Island after a friend complained 0f waking up tired and performing p00dy on a test“As sleep—depriVed(剥夺)people ourselves，we started thinking of what t0 do about it，’’says Eric Shashoua，a recent coUege graduate and now chief executive officer 0f Axon Sleep Research Laboratories，a company created by the students to develop their idea．They have almost finished a prototype and plan to market the product by next yeat"
What should the 8leeper do to make the deVice work?
A:He should press the snooze button in time． B:He should tum 0n the micmpmcessor in the clock． C:He should set the 18test time for waking up． D:He should adjust his headband．
What is the meaning of "working round the clock"?
A:Repairing clocks. B:Making clocks. C:Working with a clock nearby. D:Working day and night.
We will {{U}}set off{{/U}} after he finishes packing.
A:set out B:set back C:set up D:set down
We will {{U}}set off{{/U}} after he finishes packing.
A:set out B:set back C:set up D:set down
VF考试
