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2021．Opportunity is always behind your back.You can only catch it，when you are willing and able to
.发布：2024/5/23 20:38:36组卷：0引用：0难度：0.92022．The old man
.
这位老人应该被照顾。发布：2024/5/23 20:38:36组卷：0引用：1难度：0.72023．As scientists in the Netherlands tried to figure out how to build a super flying robot，they learned from one of nature's flyers：the humble fruit fly（果蝇）.And by building this robot，they've gained new insights into how the fly carries out one of its dangerous tasks.
The robot is called the DelFly Nimble.Its wingspan（翼展）is about a foot wide.It has four wings that can beat at 17 times per second，which appear very delicate because they're made of the same material as space blankets.
In the previous designs，they always had a tail，like a traditional airplane tail，said the robots main designer Matej Karasek.He's based at the Micro Air Vehicle Laboratory at Delft University of Technology in the Netherlands，and he and his colleagues published their findings on Thursday in Science.
"In the previous generations." he said，"flapping wings drove the robot forward while the tail helped to guide and stabilize it." But now the DelFly Nimble is completely controlled by the wings.The challenge then was actually combining the control into the wing movement，and that's what we achieved，Karasek said.
In the latest generation，the wings can each move individually or rotate（旋转）around the body of the robot in order to maximize the machine's agility（灵活）."The robot can remain in one place in the air for about five minutes on a full battery or fly for more than a kilometer，" Karasek said，"And because the scientists are controlling all the movements，they can use the robot to learn more about how fruit flies actually carry out their dangerous tasks，which has caught the attention of biologists."
（1）Where did scientists get the creative idea of the flying robot？
A．From a fruit fly.
B．From the birds wings.
C．From some fruit.
D．From an airplane.
（2）What does the underlined word "it" in Paragraph 4 probably refer to？
A．A full battery.
B．A flapping wing.
C．The DelFly Nimble.
D．The humble fruit fly.
（3）What interests biologists most about fruit flies？
A．That they are very tiny insects.
B．That they conduct challenging tasks.
C．That they can be easily found in the world.
D．That they have light wings and fly quickly.
（4）Where is the text probably taken？
A．A research paper.
B．A travel brochure.
C．A health magazine.
D．A chemistry textbook.发布：2024/5/23 20:38:36组卷：17引用：1难度：0.52024．I can't stand hanging up my clothes and cleaning up my room on a regular
（base）.发布：2024/5/23 20:38:36组卷：3引用：2难度：0.72025．写出划线短语的汉语意思
As a result，the desperate person will push away the people around him，rather than drawing them in.发布：2024/5/23 20:38:36组卷：1引用：1难度：0.92026．She had an a
（约定；约会） to paint her nails， then she went into an expensive clothes shop.发布：2024/5/23 20:38:36组卷：2引用：1难度：0.62027．His new book
（publish） yesterday.发布：2024/5/23 20:38:36组卷：1引用：1难度：0.72028．Word came that a bomb planted in a garbage can
early today.发布：2024/5/23 20:38:36组卷：2引用：1难度：0.72029．买东西时，人们有时会情不自禁地被说服买一些他们确实不需要的东西。（persuade）
发布：2024/5/23 20:38:36组卷：4引用：0难度：0.92030．When combined with berries or slices of other fruits，frozen bananas make an excellent base for thick，cooling fruit shakes and low fat "ice cream".
本句为（1）。句中非谓语动词 combined作（2）。
【译文】发布：2024/5/23 20:38:36组卷：3引用：2难度：0.8
