请问各位自考专升本和函授专升本有什么区别？

在商品赊购赊销中,到期偿还货款时货币所执行的职能是（ ）

A.价值尺度
B.流通手段
C.支付手段
D.贮藏手段

设离散型随机变量X的概率分布为

求X的数学期望EX及方差DX．

Some college students drink too much alcohol at school．Many of them live on the campus．Heavy drinking has caused many problems．It can cause students to make bad choices and do dangerous things.
One college has decided to ban alcohol．It has gotten a reputation as a party school．Five students at the college have died from drinking too much alcohol．Recently,one student drank too much vodka．He slipped into a coma．The college hopes the new rule will prevent any more tragedies.
The new rule prohibits students from drinking alcohol in the dorms．The first time a student breaks the rule they will receive a warning．If they break the rule again,they will be evicted from the dorm．However,they will still have to pay for the dorm．Some students do not live on the campus．They live in houses near the campus．Those students are also banned from drinking alcohol,even if they are of legal age.
Freshmen at the college are now required to take a special course．The course is called AlcoholEdu,and lasts for two and a half hours．The students learn about the dangers of alcohol．They also take a survey to find out how much they know about alcohol．All first-year students must pass the course.
The college hopes that more information will help students make better choices．

What type of tourist is described at the beginning of the reading?

A.A first time touris
B.An old touris
C.A tourist who has travelled a lo
D.Young tourist

Some college students drink too much alcohol at school．Many of them live on the campus．Heavy drinking has caused many problems．It can cause students to make bad choices and do dangerous things.
One college has decided to ban alcohol．It has gotten a reputation as a party school．Five students at the college have died from drinking too much alcohol．Recently,one student drank too much vodka．He slipped into a coma．The college hopes the new rule will prevent any more tragedies.
The new rule prohibits students from drinking alcohol in the dorms．The first time a student breaks the rule they will receive a warning．If they break the rule again,they will be evicted from the dorm．However,they will still have to pay for the dorm．Some students do not live on the campus．They live in houses near the campus．Those students are also banned from drinking alcohol,even if they are of legal age.
Freshmen at the college are now required to take a special course．The course is called AlcoholEdu,and lasts for two and a half hours．The students learn about the dangers of alcohol．They also take a survey to find out how much they know about alcohol．All first-year students must pass the course.
The college hopes that more information will help students make better choices．

Why does the college want all freshmen to take the alcohol course?

A.Only freshmen drink alcoho
B.The other students already know about alcohol danger
C.They want to reach students as soon as they enter colleg
D.Freshmen do not know muc