题目内容
（请给出正确答案）
The ejection fraction rate of the patients with stem cell injections decreased.
A．Right
B．Wrong
C．Not mentioned
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更多“The ejection fraction rate of …”相关的问题
A.ejection
B.dejection
C.rejection
D.injection
根据材料，完成题。
Stem Cell Therapy May Help Repair the Heart
According to scientists in the USA, stem cell therapy may one day be able to repair the hearts of people with heart failure.Researchers at Pittsburgh University School of Medicine examined 20 patients who had severe heart failure and were going to have surgery.
They injected stem cells into the parts of their hearts that were damaged. They then compared their hearts with those of people who had undergone surgery without having the stem cells injected into them (they had also suffered from severe heart failure ) . The patients who had the stem cells injected had hearts that were able to pump (用泵抽运) more blood than the others.
According to Professor Robert Kormos, one of the researchers, these results could revolutionize heart treatment. Although previous studies had indicated that there might be a benefit, this is the first study that has actually proved that stem cell therapy can help the failing heart work better.
All the patients in this study had hearts that could not pump blood properly. The scientists measured their ejection fraction (射血分数 ) . It is a measure of heart performance; you measure how much blood is being pumped out by the left ventricle (心室) .
Healthy people&39;s ejection fraction is about 55%. These patients had ejection fraction of under 35%. They all had by-pass surgery (搭桥手术) performed on them. Some of the patients had stem cells taken from their hip bones and injected into 25-30 sites in the damaged heart muscle. Six months later their ejection fraction rate was 46.1% while those who just had surgery but no stem cell injections averaged 37.2%.
Heart failure is a common problem all over the world.In the UK alone about 650,000 people suffer from heart failure every year. As the number of people suffering from heart failure increases in the word in general these findings are particularly significant.
Current treatments relieve the symptoms. This new stem cell therapy actually repairs the damaged muscle in the heart and has the potential of curing the disease.
The 20 patients had stem cell injections instead of surgery. 查看材料
A.Right
B.Wrong
C.Not mentioned
Stem Cell Therapy May Help Repair the Heart
According to scientists in the USA, stem cell therapy may one day be able to repair the hearts of people with heart failure. Researchers at Pittsburgh University School of Medicine examined 20 patients who had severe heart failure and were going to have surgery.
They injected stem cells into the pads of their hearts that were damaged. They then compared their hearts with those of people who had undergone surgery without having the stem cells injected into them (they had also suffered from severe heart failure). The patients who had had the stem cells injected had hearts that were able to pump (用泵抽运) more blood than the others.
According to Professor Robert Kormos, one of the researchers, these results could revolutionize heart treatment. Although previous studies had indicated that there might be a benefit, this is the first study that has actually proved that stem cell therapy can help the failing heart work better.
All the patients in this study had hearts that could not pump blood properly. The scientists measured their ejection fraction (射血分数). This is a measure of heart performance; you measure how much blood is being pumped out by the left ventricle (心室)
Healthy people's ejection fraction is about 55%. These patients had ejection fraction of under 35%. They all had by-pass surgery (搭桥手术) performed on them. Some of the patients had stem cells taken from their hip bones and injected into 25-30 sites in the damaged heart muscle. Six months later their ejection fraction rate was 46.1% while those who just had surgery but no stem cell injections averaged 37.2%.
No side effects were reported.
Heart failure is a common problem all over the world. In the UI~ alone about 650,000 people suffer from heart failure every year. As the number of people suffering from heart failure increases in the world in general these findings are particularly significant.
Current treatments relieve the symptoms. This new stem cell therapy actually repairs the damaged muscle in the heart and has the potential of curing the disease.
第 16 题 The 20 patients had stem cell injections instead of surgery.
A．Right
B．Wrong
C．Not mentioned
Solar Storm
At the end of October 2003, a sudden solar storm hit the earth. A solar storm refers to the large amounts of charged particles released into space(51)the solar energy increases. The release of the energy(52)place along with the activity of the sunspots with a cycle of 11 years. This time, the(53)of the storm exceeded expectations.
This(54)of intense solar storm was caused by the eruption of a solar flare (闪光) and the ejection (喷发) of the solar corona (日冠) on October 28, 2003. Large amounts of charged particles moved 150,000,000 kilometers through space toward the(55)in 19 hours. They could affect aircraft roaming (漫游) in space.
The high-energy particles will(56)some of the parts of an aircraft. They may also cause it to fail. High-energy particles can threaten the safety of an aircraft at a high orbit. If an aircraft orbits at a lower orbit, it is(57)because it is under the protection of the earth's magnetic field.
A solar storm not only affects aircraft but also is a(58)to the environment and humans. The aerosphere and magnetic field of the earth can(59)humans from ultraviolet radiation and X-rays. While most of the X-rays are absorbed after they enter the aerosphere (大气层), still a few can(60)the ground.
The geomagnetic storm caused by this round of solar storm reaches its highest level on the two(61)of the earth, which affects electricity supply of North America. Overexposure to(62)threatens the health of passengers on planes flying over the Polar Regions. If we fly in the sky during such a solar storm, it(63) we receive ten times the X-ray radiation. It's really damaging.
Scientists say a solar eruption is like the sun sneezing, which will make the earth(64)a cold. Though this natural force is irresistible, scientists can still(65)its movement accurately by monitoring. Facing successive solar storms, humans can't drop their guard.
A．since
B．when
C．until
D．though
Solar Storm
At the end of October 2003, a sudden solar storm hit the earth. A solar storm refers to the large amounts of charged particles released into space______(51) the solar energy increases. The release of the energy______ (52) place along with the activity of the sunspots with a cycle of: 11 years. This time, the______ (53) of the storm exceeded expectations.
This______(54) of intense solar storm was caused by the eruption of a solar flare (闪光) and the ejection (喷发) of the solar corona (日冠) on October 28, 2003. Large amounts of charged particles moved 150,000,000 kilometers through space toward the ______(55) in 19 hours. They could affect aircraft roaming (漫游) in space.
The high-energy particles will______(56) some of the parts of an aircraft. They may also cause it to fail. High-energy particles can threaten the safety of an aircraft at a high orbit. If an aircraft orbits at a lower orbit, it is______(57) because it is under the protection of the earth's magnetic field.
A solar storm not only affects aircraft but also is a ______(58) to the environment and humans. The aerosphere and magnetic field of the earth can______(59) humans from ultraviolet radiation and X-rays. While most of the X-rays are absorbed after they enter the aerosphere (大气层), still a few can______(60) the ground.
The geomagnetic storm caused by this round of solar storm reaches its highest level on the two______(61) of the earth, which affects electricity supply of North America. Overexposure to______(62) threatens the health of passengers on planes flying over the Polar Regions. If we fly in the sky during such a solar storm, it______(63) we receive ten times the X-ray radiation. It's really damaging.
Scientists say a solar eruption is like the sun sneezing, which will make the earth______(64) a cold. Though this natural force is irresistible, scientists can still______(65) its movement accurately by monitoring. Facing successive solar storms, humans can't drop their guard.
A．since
B．when
C．until
D．though
根据下列文章,请回答 51～65 题。
Solar Storm
At the end of October 2003, A sudden solar storm hit the earth. A solar storm refers to the large a mounts of charged particles released into space __________ (51) the solar energy increases. The release of the energy __________ (52) place along with the activity of the sunspots with A cycle of 11 years. This time, the __________ (53) of the storm exceeded expectations.
This __________ (54) of intense solar storm was caused by the eruption of A solar flare (闪光) and the ejection (喷发) of the solar coron A(日冠) on October 28, 2003. Large a mounts of charged particles moved 150,000,000 kilometers through space toward the __________ (55) in 19 hours. They could a ffect aircra ft roa ming (漫游) in space.
The high-energy particles will __________ (56) some of the parts of an aircra ft. They may also cause it to fail. High-energy particles can threaten the sa fety of an aircra ft at A high orbit. If an aircra ft orbits at Alower orbit, it is __________ (57) because it is under the protection of the earth's ma gnetic field.
A solar storm not only a ffects aircra ft but also is a __________ (58) to the environment and humans. The a erosphere and ma gnetic field of the earth can __________ (59) humans from ultra violet radiation and X-rays. While most of the X-rays are absorbed a fter they enter the a erosphere (大气层), still A few can __________ (60) the ground.
The geoma gnetic storm caused by this round of solar storm reaches its highest level on the two __________ (61) of the earth, which a ffects electricity supply of North America . Overexposure to __________ (62) threatens the health of passengers on planes flying over the Polar Regions. If we fly in the sky during suchA solarstorm, it __________ (63) we receive ten times the X-ray radiation. It's really da ma ging.
Scientists say A solar eruption is like the sun sneezing, which will make the earth _________ (64) A cold. Though this natural force is irresistible, scientists can still _________ (65) its movement accurately by monitoring. Facing successive solar storms, humans can't drop their guard.
第 51 题
A．since
B．when
C．until
D．though
