如果f［f(x)］=4x+6，且f(x)是递增函数，则一次函数f(x)= .

从同学之间的互助，到工人之间的协作，从一个家庭的和睦相处，到国家之间合作伙伴关系的建立，合作无处不在，这是因为善于合作的人[ ]

①能正确地对待合作者

②容易获得他人的支持和帮助

③能与合作者共同分享成功的欢乐

④能够培养艰苦奋斗的精神

A．①②③

B．①②④

C．②③④

D．①③④

Justin’s bedroom was so full of flat bicycle tires, bent tennis rackets, deflated basketballs, and games with missing pieces that you could hardly get in the door.  His parents pleaded with him to clean out his room.

“What use is a fish tank with a hole in the bottom?” his father asked.  But Justin simply smiled and repeated his motto, “Never throw anything out, you never know when it might come in handy.”

When Justin was away from home, he always carried his blue backpack — a smaller bag of his bedroom — a place to store the many objects that he collected.  It was so worn and stretched that it hardly resembled a backpack anymore.

Justin had earned a reputation for figuring things out and getting people out of otherwise hopeless situations.  Many of his classmates and neighbors sought him out when they needed help with a problem.  On the first day of school, his friend Kenny, came looking for Justin.

“Do you think you have something in your backpack that could help me remember my locker combination (箱子密码)?”  he asked.  “I lost the piece of paper it was written on.  I have a science class in two minutes and if I’m late on the first day it’ll make me look bad for the rest of the year.”  Kenny looked really worried.

“Relax,” Justin said, taking his backpack off and opened it.  “Remember how you borrowed my notebook in my home to write the combination down?  Well, I know how I can recover what you wrote.”

He took the notebook and a soft lead pencil out of his backpack.  The page that Kenny had written on had left faint marks on another page in the notebook.  Justin held the pencil on its side and rubbed it lightly over the marks.  Slowly but surely the numbers of the locker combination appeared in white.

“That’ s amazing!”  Kenny said, “I owe you one.”  And he dashed off to open his locker.

It was just another day in the life of the boy whose motto was “Never throw anything out; you never know when it might come in handy.”

小题1:Why is Justin’s room in such a mess?

A．He always forgets to clean it.

B．He never throws anything out.

C．He has no time to clean it.

D．He shares the room with his brother.小题2:In what way is Justin’s blue backpack used?

A．He uses it as a place to store collected objects.

B．He uses it to carry his books and sports equipment.

C．His parents tell him to clean it all the time.

D．He carries it to remind others of his ability.小题3:The underlined phrase “pleaded with” means              .

A．ignored

B．asked

C．pushed

D．admired小题4:How does Kenny feel toward Justin?

A．Annoyed

B．Disinterested

C．Grateful

D．Angry

下列关于质点的概念的说法中，正确的是（）

A.任何细小的物体都可以看做质点

B.任何静止的物体都可以看做质点

C.一个物体是否可以看做质点，要看研究问题的具体情况而定

D.一个物体在某种情况下可以看做质点，那么在另外的情况下也可以看做质点

红河哈尼族彝族自治州位于云南省东南部。该州海拔2000米以上的山区，年平均降雨量2026.5毫米，海拔较低的山间盆地、河谷地带，年平均降雨量817.2毫米。读图并结合所学知识，回答下列各题。

受经济利益的驱使当地咖啡种植面积快速增长，水田播种面积大大缩小（咖啡种植比水稻需水量小，排水条件好），你认为大规模的咖啡种植对当地地理环境影响正确的是（）

A.河流水位的季节变化增大

B.当地气候变得更加湿润

C.水土流失减弱，河流的含沙量降低

D.生物多样性增多

具有辛凉透表、清热解毒功效的方剂是（）

A.桑菊饮

B.桂枝汤

C.柴葛解肌汤

D.升麻葛根汤

E.银翘散