[题目]关于公式W＝Ek2-Ek1＝ΔEk.下述正确的是( )A．功就是动能.动能就是功B．功可以变为能.能可以变为功C．动能变化的多少可以用功来量度D．功是物体能量的量度题目和参考答案——青夏教育精英家教网—

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【题目】关于公式W＝Ek2－Ek1＝ΔEk，下述正确的是（）

A．功就是动能，动能就是功

B．功可以变为能，能可以变为功

C．动能变化的多少可以用功来量度

D．功是物体能量的量度

【答案】C

【解析】功和能（动能）是两个不同的概念，也不可以相互转化，动能定理只是反映了合外力做的功与物体动能变化的关系，即反映了动能变化多少可以由合外力做的功来量度．

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【1】该河流径流量最小的季节是 (　　)

A. 春季 B. 夏季 C. 秋季 D. 冬季

【2】下列关于阿尔卑斯山脉成因的叙述，正确的是(　　)

A. 非洲板块与亚欧板块碰撞形成

B. 亚欧板块与印度洋板块碰撞形成

C. 亚欧板块与非洲板块张裂形成

D. 非洲板块与印度洋板块张裂形成

【3】该河流流域内出产优质葡萄的气候资源优势是(　　)

A. 夏季高温多雨 B. 全年降水丰富

C. 夏季光照充足 D. 冬季昼夜温差大

【题目】某人以20N的水平恒力推着小车在粗糙的水平面上前进了5．0m，人放手后，小车又前进了2．0m才停下来，则小车在运动过程中，人的推力所做的功为________J。

【题目】下图为我国东南某区域等高线示意图。图中等高距为50米，河流水深10米，小船上的桅杆顶端Q与水面高差为10米，结合所学知识，完成下列各题。

（1）图示地区A、Q两点的高差是________________________________________________。

（2）图中M地附近陡崖顶部的高度为________________________________________________。

（3）简述图示地区的地形特征________________________________________________。

【题目】阅读下列材料，分析回答问题。

材料一：图甲是长江中游 D湖及周边地区等高线图

材料二：图乙是 D湖沿岸某地的1954年和2014年土地利用状况示意图

（1）湖陆风是指由于湖泊与陆地热力性质差异形成的风，但易受更大范围的大气运动影响。据此简析该湖区湖陆风每年最弱的季节及主要原因。

（2）分别简述该地土地利用变化对湖泊及其周围地区环境产生的影响。

（3）图中北部河流上下游段的水文特征有明显差异。根据图中信息，简析下游段河流水文特征的明显变化及原因。

【题目】 —I listen to English every day over the radio.

—________interesting.

A．Sounds B．Sounding C．It is sounded D．Sound

【题目】【2015·四川】第一节阅读下列短文，从每题所给的四个选项（A、B、C、D）中，选出最佳选项，并在答题卡上将该项涂黑。（共20小题；每小题2分，共40分）

【1】The card above is_________

A. a ticket B. a postcard

C. an invitation D. an advertisement

【2】The party is for_________

A. a birthday

B. the Queen

C. bee watching

D. the National Day

【3】According to the card ,if you are unable to go ,you can.

A. return the card

B. visit the Museum

C. ignore the message

D. contact Alice's mother

【题目】【2015·重庆】C

LakeLander ·2 hours ago

Today, a man talked very loud on his phone on a train between Malvern and Reading, making many passengers upset. I wonder how he would react if I were to read my newspaperoutloudonthetrain, Ihave never had the courage to do it, though.

Pak50 ·57 minutes ago

Why not give it a try? Perhaps you should take lessons on a musical instrument. The late musician Dennis Brian is said to have asked a fellow train passenger to turn off his radio. When his request was refused, he took out his French horn(号) and started to practice.

Angie O’Edema ·42 minutes ago

I don’t see how musical instruments can help improve manners in public. Don’t do to others what you wouldn’t like to be done to yourself. Once, a passenger next to me talked out loud on his mobile phone. I left my seat quietly, giving him some privacy to finish his conversation. He realized this and apologised to me. When his phone rang again later, he left his seat to answer it. You see, a bit of respect and cooperation can do the job better.

Taodas ·29 minutes ago

I did read my newspaper out loud on a train, and it turned out well. The guy took it in good part, and we chatted happily all the way to Edinburgh.

Sophie 76 ·13minutes ago

I have not tried reading my newspaper out loud on a train, but ,several years ago, I read some chapters from Harry Porter to my bored and noisy children. Several passengers seemed to appreciate what I did.

【1】The passenger made an apology to Angie O’Edema because____.

A. he offered his seat to someone else

B. he spoke very loudly on his phone

C. he refused to talk with Angie

D. he ignored Angie’s request

【2】Who once read a newspaper out loud on a train?

A. Pak50 B. Angie O’Edema

C. Taodas D. Sophie76

【3】What is the discussion mainly about?

A. How to react to bad behavior.

B. How to kill time on a train.

C. How to chat with strangers.

D. How to make a phone call.

【4】Where is the passage most probably taken from?

A. A webpage. B. A newspaper.

C. A novel. D. A report.

【题目】普罗旺斯是世界闻名的薰衣草故乡、旅游胜地，同时它还是法国著名的葡萄酒产地。浓浓地中海风格的葡萄酒庄园与紫色花海翻腾的薰衣草共同构成了一道传统而精彩的普罗旺斯风景线。图4示意普罗旺斯薰衣草和葡萄分布状况。读图，完成下列问题。

【1】造成薰衣草与葡萄分布区位置不同的主导因素是

A．河流 B．气候

C．土壤 D．地形

【2】据图中信息推测薰衣草的生长习性

A．无法忍受高温，忌潮湿多雨

B．最适宜酸性土壤环境

C．耐旱、耐寒、抗盐碱，喜高温

D．需水肥量大，喜阳光

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