20．______ more efficiently，they stopped to have a coffee break．（　�。�
A．WorkingB．To workC．WorkD．Worked

分析 為了工作更有效率，他們停下來喝杯咖啡休息一下．

解答 答案：B 題干中有逗號(hào)分隔，沒有連詞，要用非謂語動(dòng)詞；work與主語they之間是主動(dòng)關(guān)系；句意表達(dá)的是目的，是一個(gè)目的狀語，不是表示伴隨動(dòng)作，要用動(dòng)詞不等式表示．故選B．

點(diǎn)評(píng) 動(dòng)詞不等式是非謂語動(dòng)詞的一種，也是英語中比較活躍的一類結(jié)構(gòu)．通常用來作主語，賓語，表語，定語，狀語等．學(xué)習(xí)時(shí)要全面掌握，熟練運(yùn)用．

練習(xí)冊系列答案
相關(guān)習(xí)題

科目：高中英語 來源：2016-2017學(xué)年河北省唐山市高二下學(xué)期期中考試英語試卷（解析版） 題型：閱讀理解

Hummingbirds (蜂鳥) are one of nature’s most energetic fliers and the only birds to hover in the air by relying on their strength alone.

Now scientists have found that it is the ratio (比值) of the bird’s wing length to its width that makes them so efficient. The discovery is helping experts compete with 42 million years of natural selection to build helicopters that are increasingly efficient.

David Lentink, an assistant professor at Stanford University in California, tested wings from 12 different species of hummingbirds, which he sourced from museums. He placed them on a machine used to test the aerodynamics (氣力學(xué)) of the helicopter blades (槳葉). Professor Lentink’s team used the same machine to test the blades from an advanced micro-helicopter used by the UK’s army. They found that the micro-helicopter’s blades are as efficient at hovering as the average hummingbirds.

But while the micro-helicopter’s blades kept pace with the average hummingbird wings, they could not keep up with the most efficient hummingbird’s wing. The wings of Anna’s hummingbird were found to be about 27 percent more efficient than the man-made micro- helicopter’s blades.

While Professor Lentink wasn’t surprised at nature’s superiority, he said that helicopter blades have come a long way. “The technology is at the level of an average hummingbird,” he said. “A helicopter is really the most efficient hovering device that we can build. The best hummingbirds are still better, but I think it’s amazing that we’re getting closer. It’s not easy to match their performance, but if we build better wings with better shapes, we might match hummingbirds.”

Professor Lentink said that we don’t know how hummingbirds maintain their flight in a strong wind, how they navigate (確定方向) through branches, or how they change direction so quickly. He thinks that great steps could be made by studying wing aspect ratios—the ratio of wing length to wing width. Understanding these abilities and characteristics could be a benefit for robotics and will be the focus of future experiments.

1.What did the scientists find about hummingbirds?

A. Their wings are long and wide.

B. They can hover in the air for a long time.

C. The ratio of their wing length to wing width is very important.

D. They are the most energetic flier in nature.

2.Which is the right order of Professor Lentink’s research?

① Tested wings from different species of hummingbirds.

② Got resources from museums.

③ Analyzed the results and drew a conclusion.

④ Tested the blades from a micro-helicopter.

A. ①②③④ B. ②①③④ C. ②④①③ D. ②①④③

3.According to Professor Lentink, what will be the focus of future experiments?

A. To know how hummingbirds can fly in a strong wind.

B. To know how hummingbirds change direction so quickly.

C. To develop a new kind of helicopter.

D. To study the secrets of hummingbirds.

查看答案和解析>>

科目：高中英語 來源： 題型：選擇題

8．It is well-known that knowledge is ______ treasure house，but practice is ______ key to it．（　�。�
A．a； theB．the； theC．a； 不填D．不填； the

查看答案和解析>>

科目：高中英語 來源： 題型：選擇題

8．________ it is so hot，I guess we can't do anything until after dark．（　�。�
A．In caseB．Now thatC．Even ifD．As though

查看答案和解析>>

科目：高中英語 來源： 題型：選擇題

15．The influence of this book might not have been reaching so far，________for Mr．William，who dared to publish it．（　　）
A．if had it not beenB．is it not being
C．had it not beenD．its only having been

查看答案和解析>>

科目：高中英語 來源： 題型：選擇題

5．He is ______ a growing number of Chinese who are finding little time to read each day．（　�。�
A．amongB．betweenC．throughD．during

查看答案和解析>>

科目：高中英語 來源： 題型：選擇題

12．-Are you still thinking about the email Tony sent you yesterday？
-Oh，to tell the truth，that's          makes me feel excited．（　�。�
A．WhatB．howC．thatD．why

查看答案和解析>>

科目：高中英語 來源： 題型：閱讀理解

2．Speed-reading is an essential skill in the Internet age．We skim over articles，e-mails to try to grasp key words and the essential meaning of a certain text．Continuous information from our electronic devices，it would be impossible to cope if we read word by word，line by line．But a new trend calls on people to unplug and enjoy reading slowly，listing benefits beyond intellectual development．
A recent story from The Wall Street Journal reported on a book club in Wellington，New Zealand，where members meet in a cafe and turn off their smart phones．They sink into cozy chairs and read in silence for an hour．
Some of these benefits have been backed up by science．For example，a study of 300elderly people published by the journal Neurology last year showed that regular engagement in intellectual activities like slow-reading slowed the rate of memory loss later in life．
Yet technology has made us less attentive readers．Screens have changed our reading patterns from the linear，left-to-right sequence to a wild skimming and skipping pattern as we hunt for important words and information．The Internet may have made us stupider，says Patrick Kingsley from The Guardian．
Slow reading means a return to an uninterrupted，linear pattern，in a quiet environment free of distractions．Aim for 30minutes a day，advises Kelly from The Atlantic．"You can spend half an hour pretty easily if only during your free moments-whenever you find yourself automatically firing up your laptop to check your favorite site，or scanning Twitter for something to pass the time-you pick up a meaningful work of literature．"

35．We can conclude from the passageC．
A．People dislike reading in their daily life
B．Reading through smart phones is a new trend
C．Some benefits could be gained beyond reading
D．People could do anything in the Wellington book club
36．What advantage of slow-reading is mentioned in the passageD？
A．Improving some reading skills．
B．Specializing in collecting news．
C．Exploring a new method of reading．
D．Reducing the memory loss．
37．Which of the following suggestions can be Kelly'sD？
A．To spare some time to check emails every day．
B．To go through some sites to kill time every day．
C．To chat with favorite persons on Twitter every day．
D．To read literary works for 30minutes every day．
38．What's mainly talked about in the passageB？
A．Fast reading is very important in life． 
B．Slow reading is necessary in life．
C．People must read as quickly as possible． 
D．Life is reading for all the people．

查看答案和解析>>

科目：高中英語 來源： 題型：閱讀理解

6．Fifty has never looked better．
It's been 50years since the first James Bond film，Dr．No，premiered （首映） in cinemas．As first embodied by Scottish actor Sean Connery，Agent 007was a fearless，cool-as-ice spy who excelled at sleuthing （偵查），fighting and saving the world．
Since then，more than 20films featuring the iconic （偶像的） spy have been released-making it one of the longest-running franchises （授權(quán)） in the history of cinema．On Nov 9，the 23rd Bond movie，Skyfall，celebrated the legend's 50th birthday．
Over the years，audiences have changed．It doesn't matter．Six different actors have acted 007and it doesn't matter．Even shocking technological and cultural changes can't bend Bond．Why？Is it the action，the sexy women，the cars，the gadgets and the exotic locations？Yes，but the most important reason is still the man himself．Bond can challenge his boss and shoot a bad guy in mere minutes．He is an expert in literature，languages，art and fine wines． He has a sharp tongue besides his wits．
In the first film Dr．No，as Connery lit a cigarette，we heard James Bond's voice and saw his café for the first time．The simple scene and short phrase have defined the character for half a century．
"Next to the Beatles and Stones，James Bond was the greatest British import of the 1960s，"David Kamp，a US contributing editor for Vanity Fair，wrote in a recent article about the birth of Bond and its influence on the US．
The Bond phenomenon has clearly affected movie culture，pop culture and spy culture．But perhaps the most amazing thing is that 007has survived in the age of feminism．"Talking of objectifying women，Bond is essential Huge Henfner （founder of Playboy magazine） with a gun，"movie critic Xan Brooks told The Guardian．"But women liked Bond，too．He couldn't have run for 50years with male fans alone．"
We love Bond for many reasons-after all 50years，Bond is still breathtaking．thrilling ride into the very heart of an icon like no other．But most of all，we may love him for one reason："he always gets away with it．"one said．

26．What attracts the audience most in James Bond films？C
A．The violent fighting scenes．   B．The sexy women．
C．Everything about Bond himself． D．The car racing．
27．What does the underlined sentence mean in Paragraph 4？D
A．He can read people's thoughts．
B．He can easily beat any man who wants to murder him．
C．He can predict what people are going to do by observing them．
D．He has an unkind way of speaking and always thinks quickly and clearly．
28．According to the passage，which of the following is TRUE？D
A．The first James Bond film was produced in 1963．
B．Skyfall is the last James Bond film．
C．David Kamp is a UK editor for the Guardian．
D．The James Bond film was popular in the age of feminism．
29．What does the movie critic Xan Brooks imply？D
A．James Bond films are not accepted by young girls．
B．Men are especially interested in James Bond films．
C．Bond is actually a man against feminism．
D．Women are fond of James Bond films too．
30．What is the best title of the passage？A
A．Still Going Strong Fifty Years on． 
B．Introduction about James Bond films．
C．Secrets of 007．   
D．The Last James Bond films．

查看答案和解析>>

同步練習(xí)冊答案