题目内容

Mary won’t keep slim ______she takes exercise every day.

A. unless B. if C. when D. or

A

【解析】

试题分析：考查连词。句意：玛丽不会保持苗条除非她每天锻炼。由题意可知前后是因果转折关系，所以选A。

考点：考查连词

练习册系列答案
相关题目

— I really can't put up with what he said yesterday.

—______. He was just joking.

A. I am afraid not B. Not at all

C. Take your time D. Don't take it to heart

I am very _______ in the book.

A. interesting B. interest

C. interested D. interests

Researchers are now using 3D printing to create models of the human heart to help heart specialists. The heart doctors can use the models to better help patients before an operation.

Dr. Bramlet, a children’s heart expert at the University of Illinois College of Medicine, says the 3-D models show information he cannot get any other way.

“And so what we’ve done with the printed models? We’ve pulled it out of the screen so that you can actually hold it in your hand and evaluate the anatomy（解剖）.”

A 3-D printer uses images from a digital display to create a physical model of a human heart. Matthew Bramlet says doctors can use the model to understand the anatomy.

Pictures from medical tests like CAT scan or MRI are sent to a 3-D printer to create a heart in a plaster（石膏）form. The printer then constructs the heart, thin layer by thin layer. Dr. Bramlet says the model matches the real heart in every detail. “When we’re done with the model and made our decision, we want to be able to go back to the source image and confirm those findings,” he says.

Dr. Bramlet has built model hearts for different kinds of heart operations. All of the operations were successful. In his first case, digital images showed only one tiny hole in a baby’s heart. But, the 3-D printed model showed several defects or problems that the baby was born with. Dr. Bramlet says those defects could not be seen easily in the images. The heart surgeon was able to change the type of surgery for the patient based on the 3-D model. He added that 3-D heart models saves time during heart operations.

Kathy Magliato is a heart surgeon at Saint John’s Health Center in Los Angeles. She welcomes the new technology. She says it could help her make better decisions before she operates on the hearts of her patients.

“I can then take this very complicated structure before the operation and I can hold it in my hand and plan an operation around what I’m seeing, touching and feeling. That to me is what can potentially change the game in an operation and save lives.”

Dr Bramlet continues to research the technology. He is working with the National Institutes of Health to build a 3-D library that includes heart models and images that others can use.

1.Whats the main idea of the passage?

A. The application of 3-D printing in heart operations

B. The development of 3-D technology.

C. The difficulties of heart operations.

D. Heart operations with the help 3-D models.

2.What is the biggest advantage of 3-D models in the diagnose of heart problems?

A. Surgeons can see, touch and feel the 3-D models.

B. They can help surgeons save time.

C. They can be made exactly like the hearts.

D. They can help discover the otherwise hidden heart problems.

3.Which of the following statements is TRUE?

A. The 3-D model can be taken out of a screen.

B. CAT scan and MRI are no longer needed.

C. The 3-D model is an exact copy of the heart.

D. Digital images are not reliable in heart operations.

4.What can we infer from the passage?

A. Digital images will mislead heart surgeons.

B. More patients will benefit from the 3-D technology.

C. Heart operations will never fail with 3-D models.

D. Surgeons cannot operate on hearts without 3-D models.

The climate in Chengdu is warmer than______in Harbin.

A. it B. one C. this D. that

Chinese parents are very generous when it comes to educating their children. Not caring about the money, parents often send their children to the best schools or even abroad to England, the US or Australia. They also want their children to take extra-course activities where they will either learn a musical instrument or ballet, or other classes that will give them a head start in life. The Chinese believe that the more expensive an education is, the better it is. So parents will spend unreasonable amount of money on education. Even poor couples will buy computers for their sons or daughters.

However, what most parents fail to see is that the best education they can give to their children is usually very cheap.

Parents can see that their children’s skills vary, skilled in some areas while poor in others. What most parents fail to realize though, is that today’s children lack self-respect and self-confidence.

The reasons are that parents are only educating their children on how to take multiple-choice tests and how to study well, but parents are not teaching them the most important skills: they need to be confident, happy and clever.

Parents can achieve this by teaching practical skills like cooking, sewing and doing other housework.

Teaching a child to cook will improve many of the skills that he will need later in life. Cooking demands patience and time. It is an enjoyable but difficult experience. A good cook always tries to improve his cooking, so he will learn to work hard and gradually finish his job successfully. His result, a well-cooked dinner, will give him much satisfaction and a lot of confidence. These activities are not only teaching a child to work, but rather to think, and to use his mind. And that is more important.

I _____ through the hard time but for my teacher’s generous and timely help.

A. couldn’t have gone B. could go

C. mustn’t have gone D. hadn’t gone

根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。

No matter how old you are, your mom will always remain as one of the most important people in your life. Maybe you don't know how to express your appreciation and love to her on an ordinary day. 1. Here are several things we can do this Mother's Day to show how much we appreciate and care for our mothers.

Give her flowers. 2.You can show your love to your mom by giving her flowers that match her personality. Or, if you do not know your mom's favorite, carnations(康乃馨) could be your best choice.

Cook for her. Mothers usually are the ones who cook for us. Your mom will absolutely love it if you surprise her by taking over the kitchen and cooking something for her. Just make sure you clean up afterwards.

3. You can just do so describing how much your mother means to you. It can be very effective that your mom will keep them and always be reminded of how important she is to your lives as a family member.

Travel with her. Mothers work hard, so traveling can help her to relax and forget her problems. She will treasure the moment — wherever you go, just your presence. 4.

Take her to a spa. Massages or spas（按摩保健） are for moms of all ages, and she will enjoy breaking the boredom of staying indoors the whole day. 5. .

Mother's Day is coming. It is a time to let Mom know she's special to you.

A. Write her a letter.

B. Remember her wedding anniversary.

C. A lot of us forget that the best gift to give her is ourselves.

D. Almost every girl appreciates flowers and so does your mother.

E. She remains the center of attention and respect for a child for a long time.

F. And this will offer your mom comfort and an increased sense of well-being.

G. However, Mother's Day is the special time when you can let her know how important she is to you.

______yourself with positive people and you will keep focused on what you can do instead of what you can’t.

A. Surrounding B. Surrounded

C. Surround D. Having surrounded

违法和不良信息举报电话：027-86699610 举报邮箱：58377363@163.com

精英家教网