當(dāng)前位置：人教版必修三《Unit 3 Environmental Protection》2022年同步練習(xí)卷（A卷）> 試題詳情

California has lost half its big trees since the 1930s，according to a study to be published Tuesday and climate change seems to be a major factor（因素）.
   The number of trees larger than two feet across has declined by 50 percent on more than 46，000 square miles of California forests，the new study finds.No area was spared or unaffected，from the foggy northern coast to the Sierra Nevada Mountains to the San Gabriels above Los Angeles.In the Sierra high country，the number of big trees has fallen by more than 55 percent；in parts of southern California the decline was nearly 75 percent.
   Many factors contributed to the decline，said Patrick McIntyre，an ecologist who was the lead author of the study.Woodcutters targeted big trees.Housing development pushed into the woods.Aggressive wildfire control has left California forests crowded with small trees that compete with big trees for resources（資源）.
   But in comparing a study of California forests done in the 1920s and 1930s with another one between 2001 and 2010，McIntyre and his colleagues documented a widespread death of big trees that was evident even in wildlands protected from woodcutting or development.
   The loss of big trees was greatest in areas where trees had suffered the greatest water shortage.The researchers figured out water stress with a computer model that calculated how much water trees were getting in comparison with how much they needed，taking into account such things as rainfall，air temperature，dampness of soil，and the timing of snowmelt（融雪）.
   Since the 1930s，McIntyre said，the biggest factors driving up water stress in the state have been rising temperatures，which cause trees to lose more water to the air，and earlier snowmelt，which reduces the water supply available to trees during the dry season.

（1）What is the second paragraph mainly about？
A
A

A．The seriousness of big-tree loss in California.
B．The increasing variety of California big trees.
C．The distribution of big trees in California forests.
D．The influence of farming on big trees in California.
（2）Which of the following is well-intentioned but may be bad for big trees？
D
D

A．Ecological studies of forests.
B．Banning woodcutting.
C．Limiting housing development.
D．Fire control measures.
（3）What is a major cause of the water shortage according to McIntyre？
C
C

A．Inadequate snowmelt.
B．A longer dry season.
C．A warmer climate.
D．Dampness of the air.
（4）What can be a suitable title for the text？
A
A

A．California's Forests：Where Have All the Big Trees Gone？
B．Cutting of Big Trees to Be Prohibited in California Soon
C．Why Are the Big Trees Important to California Forests？
D．Patrick McIntyre：Grow More Big Trees in California

【考點(diǎn)】傳統(tǒng)習(xí)俗與文化；說明文．

【答案】A；D；C；A

【解答】

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發(fā)布：2024/10/30 10:0:2組卷：19引用：1難度：0.5

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（1）It is commonly believed that high birth rate and divorce rate will bring about

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A．social problems
B．a(chǎn) sense of wellbeing
C．a(chǎn) unique welfare system
D．a(chǎn) modern way of life
（2）Which of the following is NOT mentioned as the cause of Icelander's happiness？

A．Geographic location
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發(fā)布：2024/10/27 17:0:2組卷：2引用：0難度：0.6
解析
2．Chopsticks are shaped pairs of equal-length sticks that have been used in the kitchen and on the table in almost all of East Asia for over 6，000 years.First（1）

（use）by the Chinese，chopsticks later spread to other locations（2）

（include） Japan，Korea，Malaysia，Singapore，Thailand and Vietnam.
In ancient China，chopsticks signified far more than tools（3）

take food to the mouth，and they also signified status and rules "can" and "can't".During the Northern Song Dynasty，（4）

official named Tang Su once had dinner with the emperor.He was not well informed in noble table manners and（5）

（lay） down his chopsticks horizontally on the table before the emperor did.As a result，he was sent to a frontier area as a（6）

（punish）.
Actually，there were over a dozen taboos concerning chopsticks.For example，they could not be placed（7）

（vertical） into a dish，as this was a way of making sacrifices to the dead.Diners could not tap（8）

push a dish with chopsticks，nor use a chopstick as a fork.When taking food，they could not let their chopsticks go from one dish to another or cross over（9）

of others.When diners wanted（10）

（put） down their chopsticks during a meal，they would place them lengthways on a chopstick holder or on the plate on their right-hand side.Many of these chopstick taboos are valid to this day.
發(fā)布：2024/10/27 17:0:2組卷：18引用：2難度：0.5
解析
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（understand） what you can and cannot do． If we are not aware（4）

these differences， some unusual （5）

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（be） rude to put the chopsticks into a bowl of rice straight as it is often done for the dead． If you visit Nepal， you will find Nepalese often greet each other with the hands pressed together instead of shaking hands， while in North America and the UK， people greet one another by （7）

（shake） hands． If you will do business with a South American， it seems （8）

（impolitely） to be dressed in the light colors． What about Japanese？ They （9）

（like） the lotus and do not give it as a gift to Japanese because they regard it as the mourning flower． While these different customs might seem strange to you， remember that （10）

you consider normal probably seems just as unusual to others．
發(fā)布：2024/10/27 17:0:2組卷：5引用：2難度：0.6
解析

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