市场细分变更交易可支持客户升级市场细分及降低市场细分。

频率和频数适用于哪种尺度测量所获得的资料( )

A．所有尺度

B．定序尺度

C．定距尺度

D．定比尺度

对未按规定办理税务登记的临时从事经营的纳税人，由税务机关核定其应纳税额，责令缴纳；不缴纳的，税务机关可以扣押其价值相当于应纳税款的商品、货物。当事人应当自扣押之日起（ ）日内缴纳税款。

A．5

B．10

C．15

D．30

阅读理解。

     Are you sometimes a little tired and sleepy in the early afternoon? Many people feel this way after lunch.

They may think that eating lunch is the cause of the sleepiness. Or, in summer, they may think it is the heat.

However, the real reason lies inside their bodies. At that time-about eight hours after you wake up-your body

temperature goes down. This is what makes you slow down and feel sleepy. Scientists have tested sleep habits

in experiments where there was no night or day. The people in these experiments almost always followed a

similar sleeping pattern. They slept for one long period and then for one short period about eight hours later.

     In many parts of the world, people take naps (小睡) in the middle of the day. This is especially true in

warmer climates (气候), where the heat makes work difficult in the early afternoon. Researchers are now

saying that naps are good for everyone in any climate. A daily nap gives one a more rested body and mind

and therefore is good for health in general. In countries where naps are traditional (传统的), people often

suffer less from problem such as heart disease.

     Many working people, unfortunately, have no time to take naps. Though doctors may advise taking naps,

employers do not allow it! If you do have the chance, however, here are a few tips about making the most

of your nap. Remember that the best time to take a nap is about eight hours after you get up. A short sleep

too late in the day may only make you feel more tired and sleepy afterward. This can slao happen if you sleep

for too long. If you do not have enough time, try a short nap-even ten minutes of sleep can be helpful.

1. If you get up at 6:30 am, what is the best time for you to take a nap?

A. About 12:30 pm

B. About 2:30 pm

C. About 1:30 pm

D. About 3:30 pm

2. What advice does the writer give on taking a nap?

A. You'd better take a nap about an hour after you have lunch.

B. You can sleep as long as you like so that you will not feel tied or sleepy.

C. Only people in warmer climate need to take a nap.

D. If your time is limited, a short nap can also help.

3. Naps are good for everyone in any climate because _________ .

A. a nap makes both your body and mind have a good rest.

B. a daily nap benefits your health.

C. people who often take naps suffer less from problems such as heart disease than those who don't.

D. All the above.

4. What would be the best title for the text?

A. Just for a Rest

B. All for a Nap

C. A Special Sleep Pattern.

D. Taking Naps in Warmer Climate.

商业助学贷款中借款人在校学制年限是指从贷款发放至借款人毕业或终止学业的期间。( )