在等差数列{an}中,前四项之和为60,最后四项之和为100,所有项之和是120

题型:选择题

问题:

在等差数列{an}中,前四项之和为60,最后四项之和为100,所有项之和是120,则项数n为(  )

A.3

B.4

C.5

D.6

考点:等差数列的定义及性质
题型:选择题

为什么要规定限界?

题型:选择题

When someone gives you advice, listen without judgment, try to find value in what you’re hearing, and say “Thank you”.This wise advice is easy to understand yet hard to practice.I’ll give you an example from my life when I totally blew it in terms of practicing what I teach.

In my work I travel constantly.I always put off going to the airport until the last second.My wife, Lynda, was sitting next to me in the front seat.I was racing along and not paying much attention.Lynda cried out, “Look out! There is a red light up ahead.”

Being a trained behavioral science professional --- who teaches others the value of encouraging advice --- I naturally screamed at her, “I know there is a red light up ahead! Don’t you think I can see?” When we arrived at the airport, Lynda didn’t speak to me.I wondered why she seemed mad at me.

During the flight to New York, I did a cost-benefit analysis.I asked myself, “What was the cost of just listening when Lynda called out the warning? Zero.” I then reasoned, “What was the potential benefit? What could have been saved?” Several potential benefits came to mind, including her life, my life, and the lives of other people.

I landed in New York feeling ashamed of myself.I immediately called Lynda and told her my cost-benefit story.I convinced her, “The next time you help me with my driving, I am just going to say, ‘Thank you.’”

A few months passed, and I had long forgotten the incident.Again, I was racing off to the airport, when Lynda cried out, “Look out for the red light!” I was embarrassed, and then shouted, “Thank you!”

I’m a long way from perfect, but I’m getting better.My suggestion is that you get in the habit of asking the important people in your life how you can do things better.And be ready for an answer.Some people may tell you things like “Look out for the red light.” When this happens, remember that there is possibly some potential benefit.Then just say, “Thank you.”

小题1:What do we know about the author?

A.He is expert at behavioral science.

B.He is gifted in cost-benefit analysis.

C.He always takes his wife’s advice.

D.He often runs the red traffic light.小题2:The underlined part “blew it” in Paragraph 1 probably means “__________”.

A.lost personal judgment

B.forgot the practical method

C.became annoyed with the adviser

D.failed to say “Thank you”小题3:It can be inferred from the passage that people __________.

A.should give their opinions patiently

B.tend to be defensive when given advice

C.had better study behavioral science

D.intend to follow others’ suggestions小题4:The purpose of the passage is to advise people to __________.

A.do a cost-benefit analysis in daily life

B.discover potential benefits

C.learn from the author’s experiences

D.treasure others’ suggestions

题型:选择题

新生儿常见的特殊生理状态,以下哪项不符合

A.生理性黄疽

B.假月经

C.新生儿粟粒疹

D.新生儿湿肺

E.乳腺肿大

题型:选择题

根据《合伙企业法》的规定,合伙人对合伙企业有关事项作出决议,按照合伙协议约定的表决办法办理。合伙协议未约定或者约定不明确,《合伙企业法》又没有规定的,实行( )的表决办法。

A.合伙人一人一票并经全体合伙人过半数通过

B.合伙人一人一票并经全体合伙人2/3以上通过

C.合伙人一人一票并经全体合伙人一致通过

D.合伙人一人一票并经出席会议的合伙人过半数通过

题型:选择题

为什么国珍松花粉采用片剂型?

更多题库