已知函数f（x）=x2+（3m+1）x+3m（m＞0）的图象与x轴交于不同的两点
题型：解答题
问题：
已知函数f（x）=x2+（3m+1）x+3m（m＞0）的图象与x轴交于不同的两点A，B且|AB|=2．
（1）求实数m的值；
（2）设g（x）=f（x）-λx，x∈[0，+∞），若g（x）图象上的点都在直线y=1上方，求λ的取值范围．
题型：解答题
Junelle Lynch knocked on more than 200 doors in the Gayln Manor neighborhood of Brunswick in recent weeks. Her aim is to collect food for Brunswick Food Bank.
“I like helping people a lot,” said Junelle, who celebrated her 11th birthday in July.
With the support of her parents, Junelle walks along the streets with an orange bag. Her mother follows her by car
, so Junelle can empty her bag when it becomes heavy. Isabella always accompanies(陪伴) her daughter.
Neighbor Lynda Mallory dropped noodles and canned soup, vegetables and fruit into Junelle’s bag. After visiting the last house, Junelle said she felt good about what she had achieved with the help of her neighbors.
Working an hour a night three times per week, she has collected more than 400 pounds of canned and boxed food. This isn’t the first year she has collected food. Junelle started nearly three years ago, at 8 years old, when she saw a collection box at a grocery store and decided to be a volunteer. In her first year, she collected 80 pounds of food in the undeveloped neighborhood, and 214 pounds the next year. The food helped feed many poor families. Her parents couldn’t be prouder of their daughter.
The Brunswick Food Bank volunteer manager Sandy Cox said, “I find her to be an amazing young lady. I don’t think I’ve seen someone that young who cares about the needs of other people so much. I wish other people would follow her.”
1. According to the passage, the Brunswick Food Bank is probably _____ .
A. a bank for people to save and draw money
B. a place to store food and give it out when the market is short
C. an organization to help the poor by collecting food for them
D. an organization which collects food and then sells it
2. Isabella usually helps her daughter by _______.
A. asking the neighbors for food B. following her and letting her empty the bag
C. offering her food for free D. putting canned and boxed food in the car
3. What do we know about Junelle’s food collecting?
A. She spends several hours doing it each week.
B. She did it following her parents’ advice.
C. She believes she can collect much more food next year.
D. She did it because she wanted to work for the grocery store.
4. What do we know from the passage?
A. Junelle has collected food for more than three years.
B. Junelle often collects food with her father.
C. Junelle started collecting food when she was 11.
D. In Junelle’s parents’ opinion, she is a very good girl.
5. Why does Sandy Cox wish that other people would follow Junelle?
A. Because Junelle cares about what other people need.
B. Because Junelle has collected more food than other people.
C. Because neighbors are willing to help Junelle.
D. Because the Brunswick Food Bank needs more food.