在等差数列{an}中,有a6+a7+a8=12,则此数列的前13项之和为____

题型:填空题

问题:

在等差数列{an}中,有a6+a7+a8=12,则此数列的前13项之和为______.

考点:等差数列的定义及性质等差数列的前n项和
题型:填空题

如果对关系e mp(e no,e name,salary)成功执行下面的SQL语句:
CREATE CLUSTER INDEX name_index ON e mp(salary)
其结果是( )。

A.在e mp表上按salary升序创建了一个聚簇索引
B.在e mp表上按salary降序创建了一个聚簇索引
C.在e mp表上按salary升序创建了一个唯一索引
D.在e mp表上按salary降序创建了一个唯一索引

题型:填空题

Uncle Li and Uncle Wang are good friends. They live next to each other and their farms are both at the foot of the mountain. So they can help each other. But neither of them likes to use his head. They’re both poor though they work hard. Most villagers have built new houses, but they still live in the low and broken houses. They never find out why.
Once Uncle Li went to the town to buy some medicine for his wife. In the town he heard apples in a city were expensive. He told Uncle Wang about it as soon as he went back. They decided to carry some apples to the city. They borrowed some money from their friends and bought nearly 1,000 kilograms of apples in the villages and carried them to the city on a tractor. Bad luck! A lot of apples has already been carried there when they arrived. A few days later they had to sell them at a low price. They felt unhappy and returned to their village.
"I can’t understand why we sustained (蒙受) losses in business while others always profit (盈利)" Uncle Li asked one day.
"The tractor was too small" Uncle Wang said without thinking. "We’ll carry more apples on a truck next time!"
"I agree!" said Uncle Li. "How foolish we were!\

Which of the following is TRUE

A.The two farmers found out why they were poor.

B.The two farmers will soon get rich.

C.Neither of the farmers is clever.

D.The two farmers decided to buy a truck.

题型:填空题

有限责任公司中,自然人股东死亡后,除公司章程另有规定外,其合法继承人一般不可以继承其股东资格。 ( )

题型:填空题

李先生储蓄人民币1200元,定期2年,月利率为0.9%,到期时,他可得到本息共多少元( )

A.50

B.28

C.1229

D.1459.2

题型:填空题

领导的资源控制权包括()

A.决策权

B.专长权

C.物资分配权

D.财务审批权

E.奖惩权

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