當(dāng)前位置：人教版（2019）必修第三冊(cè)《Unit 4 Space Exploration》2021年同步練習(xí)卷（Reading and Thinking 課時(shí)訓(xùn)練）> 試題詳情

The sky is a large place，and though it has been carefully examined for centuries，new features still turn up.Last March it was the rule of Uranus（天王星），and last week astronomers announced what may turn out to be a new planet，though a very small one，in the solar system.
   The object was first sighted last month by Charles Kowal，an astronomer at the Hale Observatories in Pasadena，Calif.Mr Kowal observed a faint trail of light on photographic plates，indicating that something was moving in relation to the background of stars.Other observers have confirmed the discovery.
   The "mini-planet"，identified for the time being as "Object-Kowal"，appears to be about 1.5 billion miles away，between the orbit of Saturn and Uranus，and its diameter（直徑）has been estimated at between 100 and 400 miles.Its orbit has not been determined yet，but if the orbit proves to be roughly circular，like that of the major planets，the new object would probably take 66 to 70 years to make a circuit of the sun.
   Some astronomers have speculated that Mr Kowal's discovery may be the first indication of an asteroid（小行星）belt beyond Saturn.

（1）What may have been found in the solar system according to the first paragraph？
A
A

A．A small new planet.
B．A new solar system.
C．A large new object.
D．A large new planet.
（2）What can we learn from the second paragraph？
B
B

A．What the object is like.
B．How the object was found.
C．Where the astronomers live.
D．Why the object was moving.
（3）What magazine might this passage be taken from？
A
A

A．Astronomy.
B．Industry.
C．Spaceflight.
D．Agriculture.

【考點(diǎn)】說(shuō)明文．

【答案】A；B；A

【解答】

【點(diǎn)評(píng)】

聲明：本試題解析著作權(quán)屬菁優(yōu)網(wǎng)所有，未經(jīng)書(shū)面同意，不得復(fù)制發(fā)布。

當(dāng)前模式為游客模式，立即登錄查看試卷全部?jī)?nèi)容及下載

發(fā)布：2024/5/23 20:38:36組卷：9引用：1難度：0.5

相似題

1．When it comes to making healthy lifestyle changes，which should come first-changing your diet or becoming more physically active？
   Previous studies suggested that providing people with too much information about nutrition and physical activity at once tends to be discouraging.That has led to the popularity of advising people to make changes gradually，and set smaller goals.
   So the scientists divided 200 inactive participants who were age 45 or older into four groups.One group was instructed about making diet and fitness changes at the same time，the second group was taught about diet changes first，then fitness changes four months later，the third group changed their exercise habits first and made changes in their eating habits four months later，and the final，control group was not instructed about either diet or fitness changes but about how to manage their stress.
   The researchers tracked the groups for a full year.Compared to the control group，the three intervention（干預(yù)）groups made healthy changes in their diet.Those who changed their fitness habits first significantly increased the amount of exercise they received daily compared to the other groups after four months.However，at the end of the year，the group that changed both diet and exercise at the same time was the only one that met the nationally recommended targets for both exercise and nutrition levels，while those who worked on improving their nutrition first were unable to meet the recommended levels of fitness after a year.The researchers suspect that changes to diet are easier to make than changes to physical activity.
   The findings show，however，that pairing diet and exercise changes may help to overcome some of the barriers people face in adding more physical activity into their lives.If folks change diet and exercise orderly，the scientists say，they may end up placing more importance on the first set of behavior changes and feel less pressured to address the second set.

（1）The advice mentioned in the second paragraph seemed

.
A．popular
B．dangerous
C．scientific
D．unsatisfactory
（2）Which group made progress earlier than other groups in increasing the amount of daily exercise？

A．The first group.
B．The second group.
C．The third group.
D．The control group.
（3）The reason why those improving their nutrition first failed to meet the levels of fitness after a year might be that

.
A．they might be very lazy
B．they wouldn't like to change their behavior
C．it is much harder to change physical activity
D．they might put on weight before changing their physical activity
（4）Which of the following does the author probably approve of？

A．Pairing diet and exercise changes.
B．Becoming more physically active first.
C．Changing diet and exercise following a fixed order.
D．Changing diet first and placing more importance on it.
發(fā)布：2024/11/13 2:30:1組卷：11引用：2難度：0.5
解析
2．How to Choose Extracurricular Activities From sports to clubs to outside organizations，there are many activities to take part in outside the classroom.（1）

Fortunately，it becomes quite easy once you figure out what you enjoy doing in general.With a little more careful thought，you can also choose an activity that interests you.
   Think about your interests and know your advantages.Before you start considering specific（具體的）activities，take a step back .Think about what excites you and find your passions（熱情） .（2）

Now that you have a better idea of what you like to do in general，decide on those that you are good at.Ask yourself what skills they show.Then find activities that require the same ones.Make sure that you will enjoy yourself by choosing an activity that lets you shine.
   （3）

In addition to your interests and advantages，know what you would like to improve about yourself.Use activities as a way to make yourself better.Find out new challenges，without the added stress of having to earn good grades at them.You can use activities to develop general skills that you may not have.
   Find out what activities are available（可用的）and look into each one .（4）

If the website seems incomplete，talk with your teacher or parents.Also look for calendar details，such as start-and-end dates，plus event schedules，to make sure it won't get in the way of anything else going on in your life.Once you have a list of activities that match your interests，do a little research. （5）

A.Think about skills you want to develop.
B.This can make choosing one a little difficult.
C.Use your freshman year to explore your choices.
D.In this way，you will have a better idea of what to expect.
E.Also make sure that their culture is a good match for your own personality.
F.Use those to decide on activities that will keep you interested for a long time.
G.Search your school's website for a complete list of all the activities it provides.
發(fā)布：2024/11/12 16:0:1組卷：5引用：5難度：0.5
解析
3．Shawn Seipler is on the way to saving lives with soap.It began about seven years ago as a tiny business with a few friends and family in a single car garage in Florida，where they recycled used soap into fresh bars.The organization，now called Clean the World，has grown to include cities where hotels are plentiful and used bars of soap can be gathered easily.
   As a frequent traveler while working for a tech company，Seiler had a sudden thought one night at a hotel."I picked up the phone and called the front desk and asked them what happened to the bar of soap when I was done using it." he recalled.Learning that they would go to the dustbin，he began his task to help save lives with soap and even half-used bottles of shampoo.It's a huge problem.One of the most common kinds of illnesses in the world are those that are passed from person to person and to oneself because of dirty things that are on one's hands.
   In the U.S.and other developed nations，hygiene（衛(wèi)生）products are everywhere.Not so in some other countries，where Seipler recalled visiting a hospital once in the Middle East to find that soap was in such short supply that patients had to provide their own. "It's such an important part of the interruption of infectious germs that could save so many lives，" he said.
   Clean the World now collects used soap from more than 4，000 hotels and has delivered 25 million bars to 99 countries.The process is fairly simple with the collected soap being cut into pieces and then run through machines that remove any remaining bacteria before being pressed into new bars of soap and packaged for delivery.

（1）Shawn Seipler got the idea of collecting seconding soap

.
A．by chance
B．from the front desk
C．a(chǎn)fter calling his friend
D．a(chǎn)fter visiting the Middle East
（2）How do hotels deal with used soap traditionally？

A．They sell it.
B．They save it.
C．They drop it.
D．They recycle it.
（3）What can be learned from Paragraph 3？

A．Soap isn't fully appreciated.
B．Soap can prevent many illnesses.
C．Soap is needed in developed countries.
D．Soap means little to developing countries.
（4）Which of the following can best describe Shawn Seiler？

A．Determined and optimistic.
B．Friendly and open-minded.
C．Warm-hearted and creative.
D．Hard-working and ambitious.
發(fā)布：2024/11/12 9:30:1組卷：10引用：2難度：0.7
解析

把好題分享給你的好友吧~~