题干

在单位时间里,心室收缩射入主动脉的血量与射入肺动脉的血量相比(  )

A:前者明显多于后者

B:大致相等

C:前者明显少于后者

D:无规律

上一题 下一题 0.0难度 选择题 更新时间:2015-08-19 02:41:04

答案(点此获取答案解析)

B

同类题3

阅读理解

    When I was trying to find a place where to spend my December holidays, I met by chance some cheap flights to Iceland. After checking just a few winter pictures of Iceland, I realized that the country, known as the land of fire and ice, during the cold months of the year could offer me experiences I had never had before.

    For sure you can't miss the chance to go to Iceland in winter if your traveling wish list includes at least one of the crazy experiences Iceland can offer. Iceland in the North

    Atlantic Ocean is a paradise ( 乐 园 ) for all those who want to see the northern lights, experience cold weather conditions and put themselves in geothermal ( 地 热 的 ) baths while the snow is falling on their head.

    The best way to move around Iceland is with a rental car. Distances are huge and public transport in winter is not really common out of the major towns. As we wanted to be even more convenient we decided to rent a small camper ( 野 营 车 ). Sleeping and cooking in a camper saved us a lot of driving, money and gave us the chance to be always in the right place at the right time.

    There were also no locals and in many cases no tourist facilities (设备). For us, as we slept in a camper, it was easier. But for tourists traveling by normal cars it is necessary to check the opening times of hotels and restaurants as many of them run just from June to September.

    It is amazing to experience how the weather is changing in Iceland. However, Icelanders prefer to stay inside their houses. They have even no time to complain about the weather in December. All they care about is Christmas. They love to decorate their houses, sing Christmas songs and eat typical Christmas food.

同类题4

阅读理解

    My dad is the kind of parent that expects my best. He would never be angry if I failed at something as long as I tired. He never changes his mind after he makes it, which sometimes makes him seem too stubborn. My dad's strictness comes from the way he was raised. He grew up working long hours on his family farm. His dad was bad-tempered, and he would get angry enough to throw wooden boards at my dad when he did something wrong. In high school, my dad woke up at four in the morning to get his chores(家务杂事)done and walk to school so that he would make it to basketball practice by five.

    Through all of the duties my dad had at home, he played three sports and went to school on top of it. school would have been easy, but my dad had dyslexia(读写困难)which made it nearly impossible for him to read. Since dyslexia wasn't recognized back then, every teacher my dad had passed along thinking that he was just unable to learn. My dad struggled in school until one teacher took the time to sit down and teach him how to read and write.

    The best part about my dad is his attitude toward daily life. even though he likes things once right, he also knows how go to with the flow and have a good time. My dad doesn't worry about things he can't control. When he comes home from a terrible day at work, he always puts on a smile on his face because he knows family is a lot more important than any other tings.

    I know that I get my best qualities from my parents and the way they raised me. My dad has shown me that with discipline and hard work I can achieve anything, and have fun while doing it.