题干

人体内动脉血变为静脉血,是血液经下列哪一途径实现的  (    )

A:肺循环

B:体循环

C:肺循环与体循环 

D:肺循环与冠脉循环

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答案(点此获取答案解析)

B

同类题2

完形填空

    Diane Ray was completely self-centered and very spoilt. Her parents gave her1she wanted, knowing that she would throw a temper tantrum(耍小孩脾气)if they did not. She would scream and kick and2on the floor drumming her heels. Her parents always3.

    That was why she was alone on the4, wearing an expensive swimsuit. It has taken a massive tantrum to5her parents to buy it. They were back at the beach-house,6from the tantrum she had thrown when they told her that it was too dangerous to go diving7. “Dangerous?” she had said. “You just don't want me to have8. I'm going and if you try to stop me, I'll scream.”

    “What are you doing ?” a voice asked. Diane jumped. She did not know that the man was there9  he spoke .

    “I'm going diving, ” she answered.

    “You shouldn't swim that day, ” the man10. “There is a storm coming up.”

    “You should mind your own11!” Diane replied and walked into the gentle waves.

    “If you go out there you'll be12,” the man called after her. She did not bother to reply.

    Diane slipped into the water and dived13until white caps began rolling in and it became harder to14against the current (水流). Saltwater hit against her face, making it15to breathe. Oh, why had she not listened to advice.

    Panicking, she began to16. Then, just as it seemed as if she would slip beneath the surface, she heard a17voice. “Hold on ! I'm coming.” With18, she saw the old man rowing an ancient-looking boat towards her. “I hope you've learned a lesson. You put us both in19, ” he shouted angrily, as he dragged her over the side of the20. Gratefully, Diane thanked him and ran towards the beach-house.

同类题3

阅读理解

    Below is a selection about Guinness(吉尼斯) World Records.

    Top 6 Unusual Guinness World Records

    ♦ Fastest 100 m running on all fours

    The 2008 Guinness World Records Day was, according to CWR, their biggest day of record-breaking ever, I- h more than 290.000 people taking put in record attempts in 15 different countries. Kenichi Ito's record attempt was port of this special day. He is just another example of Japanese with "super powers". His "super power" is to run with great speed on all fours. Kenichi Ito ran 100 m on all fours in 18.58 seconds. The Japanese set this record at Setagaya Kuritsu Sogo Undojyo, Tokyo, in 2008.

    ♦ Most people inside a soap bubble

    The Discovery Science Center in Santa Ana, Califomia celebrated this year the 15th anniversary of the Bubble (泡泡) Festival. A bubble's math principles and science were presented and demonstrated at the three-week-long exhibition. The intriguing Bubble Show was also part of the program. Fan Yang and Deni Yang impressed the audience with their awesome skills for bubble making. The Yang family cooperated with the Discovery Science Center to set a new Guinness World Record for mow people inside a scup bubble and they succeeded.

    The family that has been working with soap bubbles for 27 years created a huge soap bubble and got 118 people inside it. The record was set or. April 4, 2011.

    ♦ Longest ears on a dog

       A bloodhound from Illinois has the longest ears ever measured a dog. The right ear is 13.75 inches long and the left one 13.5 inches. The dog named Tigger earned this title in 2004 and is owned by Christina and Bryan Flessner.

Mr. Jeffries is the previous record holder of this title. Each of his ears measured approximately 11. 5 inches long. His grandfather used to hold this amazing world record, but when he died Mr.Jeffries look over.

    ♦ Most living generations

    Did you ever wonder what is the Guinness World Record for most living generation in one family? Seven is the answer.

    The ultimate authority on record-breaking mentions on the website that the youngest great-great- great-great grandparent of this family was Augusta Bung "aged 109 years 97 days, followed by her daughter aged 89, her granddaughter aged 70, her great grand-daughter aged 52, her great-great grand-daughter aged 33 and her great-great-great granddaughter aged 15 on the birth of her great-great-great-great grandson on January 21, 1989".

    ♦ Most T shirts worn at once

Believe it or not, there is a record also for this category. Krunoslav Budiseli set a new world record on May 22, 2010 for wearing 245 T-shirts at the same time. The nun from Croatia was officially recognized as the new record bolder by Guinness World Records after he managed to put on 245 different T-shirts in 1ess than two hours. . The T-shirts weighted 68 KG and Budiseli said he began struggling around T-shirt No. 120. He dethroned the Swedish Guinness record holder who wore 238 T-shirts.

    ♦Heaviest pumpkin

    Guinness World Records confirmed on October 9. 2010 that a gigantic pumpkin (南瓜) grown in Wisconcin was officially the world's heaviest. It weighed 1,810 pounds 8 ounces and was unveiled by Chris Stevens at the Stillwater Harvest Festival in Minnesota. Stevens' pumpkin was 85 pounds Javier than the previous re I, another huge pumpkin grown in Ohio. The proud farmer said his secret is a precise of rain, cow mature, good soil, sea grass and fish emulsion. Some of the world's heaviest pumpkins, including the record bolder, were on public display at the Bronx Botanical Gardens in New Yost for a dozen days.