【题目】下列关于“验证机械能守恒定律”实验的实验误差的说法,正确的是( )
A.重物质量的称量不准会造成较大误差
B.重物质量选用得大些,有利于减小误差
C.重物质量选用得较小些,有利于减小误差
D.打点计时器选用电磁打点计时器比电火花计时器误差要小
科目:高中地理 来源: 题型:
【题目】关于能量转化的说法中正确的是( )
A.举重运动员把重物举起来,体内的一部分化学能转化为重力势能
B.电流通过电阻丝使电能转化为内能
C.内燃机的做功冲程是内能转化为动能
D.煤炭燃烧的过程中能量不守恒
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科目:高中地理 来源: 题型:
【题目】读太阳光照图(阴影部分代表夜半球)和太阳直射点的回归运动示意图,据图回答下列问题。
(1)ME为晨昏线中的_____线。
(2)当太阳直射点由图乙中③处移向④处时,地球公转的速度变化情况为________。
(3)图甲中早晨6点的是_____点。(填字母)
(4)A点的昼长是_____小时,日落时间是_____点。
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【题目】(2015·江苏) 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
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【题目】【2015·陕西】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(物种) 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(威胁)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 (种植园)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?
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科目:高中地理 来源: 题型:
【题目】下图为我国某中学地理兴趣小组利用所在城市人口资料绘制的人口金字塔图。读图 回答下列问题。
【1】2010年,该市0~4岁女性人口占总人口的比重约为( )
A.3% B.6% C.6.2% D.4.2%
【2】该城市近三十年来人口结构变化产生的影响是( )
A.青壮年养育子女的负担逐渐加重
B.生育率逐渐增加
C.该城市逐渐迈向老龄化社会
D.青壮年男子逐渐外移
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科目:高中地理 来源: 题型:
【题目】读图,完成下面小题。
【1】关于图中景区的叙述,正确的是( )
A. 瀑布水量充沛,冬、春季节观赏效果最佳
B. 瀑布规模较大,其形成以风力侵蚀为主
C. 景区植被丰富,以落叶阔叶林为主
D. 景区地形复杂,易发生滑坡等地质灾害
【2】黄果树瀑布与十丈硐瀑布相比,景点规模相当,但旅游接待规模远大于十丈硐瀑布,其原因是黄果树瀑布景区( )
①景点知名度高,游览价值高 ②紧邻贵昆铁路,交通通达性好 ③地处热带,美学价值突出 ④邻近省级行政中心贵阳,环境承载力大
A. ①③ B. ②④
C. ①② D. ③④
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【题目】污染系数(污染系数=风向频率/平均风速)可以用来反映风对大气污染的影响。下面是我国M市多年污染系数和多年风向频率统计图。据图回答下列问题。
【1】据图判断,关于该城市污染系数的描述,正确的是( )
A.污染系数从正东向南北两个方向递减
B.风速越大该市的污染系数越大
C.污染系数越大的方向污染越严重
D.污染系数西南偏西方向最小
【2】该城市应采取的可行措施是( )
A.将污染大气的企业迁至城市北部
B.关闭所有污染大气的企业
C.将污染大气的企业迁至城市西部
D.污染物改为夜间排放
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科目:高中地理 来源: 题型:
【题目】Your skin can ________ your body losing too much water.
A.keep B.prevent C.protect D.be stopped
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