【題目】下列關于“驗證機械能守恒定律”實驗的實驗誤差的說法，正確的是（ ）
A．重物質量的稱量不準會造成較大誤差
B．重物質量選用得大些，有利于減小誤差
C．重物質量選用得較小些，有利于減小誤差
D．打點計時器選用電磁打點計時器比電火花計時器誤差要小
科目：高中地理 來源： 題型：
【題目】關于能量轉化的說法中正確的是（ ）
A．舉重運動員把重物舉起來，體內的一部分化學能轉化為重力勢能
B．電流通過電阻絲使電能轉化為內能
C．內燃機的做功沖程是內能轉化為動能
D．煤炭燃燒的過程中能量不守恒
查看答案和解析>>
科目：高中地理 來源： 題型：
【題目】讀太陽光照圖（陰影部分代表夜半球）和太陽直射點的回歸運動示意圖，據圖回答下列問題。
（1）ME為晨昏線中的_____線。
（2）當太陽直射點由圖乙中③處移向④處時，地球公轉的速度變化情況為________。
（3）圖甲中早晨6點的是_____點。（填字母）
（4）A點的晝長是_____小時，日落時間是_____點。
查看答案和解析>>
科目：高中地理 來源： 題型：
【題目】(2015·江蘇) The university started some new language programs to _____ the country’s Silk Road Economic Belt.
A. apply to B. cater for C. appeal to D. hunt for
查看答案和解析>>
科目：高中地理 來源： 題型：
【題目】【2015·陜西】C
The production of coffee beans is a huge, profitable business, but, unfortunately, full-sun production is taking over the industry and bringing about a lot of damage. The change in how coffee is grown from shade-grown production to full-sun production endangers the very existence of, certain animals and birds, and even disturbs the world’s ecological balance.
On a local level, the damage of the forest required by full-sun fields affects the area’s birds and animals. The shade of the forest trees provides a home for birds and other special(物種) that depend on the trees’ flowers and fruits. Full-sun coffee growers destroy this forest home. As a result, many special are quickly dying out.
On a more global level, the destruction of the rainforest for full-sun coffee fields also threatens(威脅)human life. Medical research often makes use of the forests' plant and animal life, and the destruction of such species could prevent researchers from finding cures for certain diseases. In addition, new coffee-growing techniques are poisoning the water locally, and eventually the world's groundwater.
Both locally and globally, the continued spread of full-sun coffee plantations (種植園)could mean the destruction of the rainforest ecology. The loss of shade trees is already causing a slight change in the world's climate, and studies show that loss of oxygen-giving trees also leads to air pollution and global warming. Moreover, the new growing techniques are contributing to acidic(酸性的) soil conditions.
It is obvious that the way much coffee is grown affects many aspects many aspects of life, from the local environment to the global ecology. But consumers do have a choice. They can purchase shade-grown coffee whenever possible, although at a higher cost. The future health of the planet and mankind is surely worth more than an inexpensive cup of coffee.
【1】What can we learn about full-sun coffee production from Paragraph 4?
A. It limits the spread of new growing techniques.
B. It leads to air pollution and global warming.
C. It slows down the loss of shade trees.
D. It improves local soil conditions.
【2】The purpose of the text is to .
A. entertain B. advertise C. instruct D. persuade
【3】Where does this text probably come from ?
A. An agricultural magazine.
B. A medical journal.
C. An engineering textbook.
D. A tourist guide.
【4】Which of the following shows the structure of the whole text?
查看答案和解析>>
科目：高中地理 來源： 題型：
【題目】下圖為我國某中學地理興趣小組利用所在城市人口資料繪制的人口金字塔圖。讀圖 回答下列問題。
【1】2010年，該市0～4歲女性人口占總人口的比重約為( )
A．3% B．6% C．6.2% D．4.2%
【2】該城市近三十年來人口結構變化產生的影響是( )
A．青壯年養育子女的負擔逐漸加重
B．生育率逐漸增加
C．該城市逐漸邁向老齡化社會
D．青壯年男子逐漸外移
查看答案和解析>>
科目：高中地理 來源： 題型：
【題目】讀圖,完成下面小題。
【1】關于圖中景區的敘述,正確的是( )
A. 瀑布水量充沛,冬、春季節觀賞效果最佳
B. 瀑布規模較大,其形成以風力侵蝕為主
C. 景區植被豐富,以落葉闊葉林為主
D. 景區地形復雜,易發生滑坡等地質災害
【2】黃果樹瀑布與十丈硐瀑布相比,景點規模相當,但旅游接待規模遠大于十丈硐瀑布,其原因是黃果樹瀑布景區( )
①景點知名度高,游覽價值高 ②緊鄰貴昆鐵路,交通通達性好 ③地處熱帶,美學價值突出 ④鄰近省級行政中心貴陽,環境承載力大
A. ①③ B. ②④
C. ①② D. ③④
查看答案和解析>>
科目：高中地理 來源： 題型：
【題目】污染系數(污染系數＝風向頻率/平均風速)可以用來反映風對大氣污染的影響。下面是我國M市多年污染系數和多年風向頻率統計圖。據圖回答下列問題。
【1】據圖判斷，關于該城市污染系數的描述，正確的是( )
A．污染系數從正東向南北兩個方向遞減
B．風速越大該市的污染系數越大
C．污染系數越大的方向污染越嚴重
D．污染系數西南偏西方向最小
【2】該城市應采取的可行措施是( )
A．將污染大氣的企業遷至城市北部
B．關閉所有污染大氣的企業
C．將污染大氣的企業遷至城市西部
D．污染物改為夜間排放
查看答案和解析>>
科目：高中地理 來源： 題型：
【題目】Your skin can ________ your body losing too much water.
A．keep B．prevent C．protect D．be stopped
查看答案和解析>>
湖北省互聯網違法和不良信息舉報平臺 | 網上有害信息舉報專區 | 電信詐騙舉報專區 | 涉歷史虛無主義有害信息舉報專區 | 涉企侵權舉報專區
違法和不良信息舉報電話：027-86699610 舉報郵箱：58377363@163.com
