题干

如图所示,飞机空中加油时,受油机与加油机以同样速度向同一方向水平飞行,下列说法正确的是(   )

A:选地面为参照物,受油机是静止的

B:选地面为参照物,加油机是静止的

C:选加油机为参照物,受油机是运动的

D:选受油机为参照物,加油机是静止的

上一题 下一题 0.0难度 选择题 更新时间:2018-11-13 05:45:49

答案(点此获取答案解析)

D

同类题1

阅读理解

    After finishing my teaching for a school year, I thought that I should go back to Montreal, Quebec, my hometown for a visit. My main goal was to relax in preparation for the challenges of my retirement in the coming year.

    Through my stay in Montreal, I met lots of Chinese who are struggling to succeed and then lead a better life in Canada.

    Some travelled thousands of miles to get knowledge. When I spoke with some of them about the major barrier they had to face after they arrived in Canada, they all talked about the two official languages of Canada. But I was impressed by their ability to express their ideas while switching between English and French.

    Almost all of those people said they often felt homesick. They miss their families and friends. Though Montreal has lots of Chinese restaurants, they long for a home-cooked meal.

    I met some tourists who were trying to realize their childhood dreams of experiencing the life in a developed country. When I asked them if Montreal had lived up to their expectations, they hesitated. They said that reality never agrees with fantasies. However, they were glad to have the opportunity to visit Montreal and didn't regret taking the trip.

    Not all the Chinese people I met were happy. I once met a young lady who met with a gentleman through the Internet. However, to her disappointment, he disappeared after he promised to marry her in Montreal.

    I was served by another Chinese person who could not handle the challenges of studying in an English environment and ended up working in a restaurant with minimum pay.

    Exploring different parts of the world, without any doubt, is an amazing experience. However, one should be realistic when it comes to leaving his hometown to set up a new life in a foreign country. One should take the time to examine the advantages and the shortcomings of the venture before they decide to chase an uncertain dream of achieving success or leading a better life.

同类题4

(2015.北京)阅读短文,根据短文内容,从短文后的五个选项中选出能填入空白处的最佳选项。每个选项只能用一次。

                                               A Special Delivery

Ben and Sally lived in California with their two daughters. Ben liked travelling.  ____, but sally stayed home with the girls. Ben and 

his friends owned a company. People at the company liked to play jokes on each other. One day, Ben’s friends wanted to play a joke on Ben and Sally.  ____The letter said, 

Dear Sally.

I’m having a great time here in Africa. I’m sending a special gift to you. I hope you like it. Please take good care of it until I get home.

Love to you and the kids,

Ben

 On the same day, Sally also got a phone call. The caller told her that a delivery was coming. At one o’clock, a truck stopped in front of 

Sally’s house. The truck driver gave Sally a rope. An animal was tied to the rope. It was a baby elephant!  ____, and it began 

eating grass. 

 Then the driver drove away. Sally stood there and held the rope to the elephant. She asked herself, “What can I feed an elephant with? 

Bananas?”

 ____. He said, “It’s illegal (非法的)to have wild animal here.” Then the policeman gave Sally a ticket. 

Ben’s friends were hiding in the backyard and laughing. They had planned everything perfectly. They had rented (租借)the elephant from a zoo and asked the policeman to write the ticket! Ben’s friends also made a film of everything.  ____

 When Sally learned about the truth, she couldn’t help laughing.

A. So they sent a letter to Sally

B. After a while, a policeman came

C. The elephant ran into Sally’s yard

D. They wanted Ben to watch the video

E. One summer, he went to Africa on a trip