更多"Scientists believe that color blind"的相关试题:
[简答题]Scientists have cured color blindness in monkeys using gene therapy.
As well as allowing color-blind humans to tell red from green, the innovative technique could restore sight to the blind.
Sufferers of age,related macular degeneration—the most common cause of blindness in the elderly—are among the millions who could eventually benefit.
Researcher Jay Neitz said: "If we could find a way to do this with complete safety in human eyes, as we did with monkeys, there would be a lot of people who would want it. We hope the technology will be useful in correcting a lot of different vision disorders. "
Professor Neitz used gene therapy—injections of genes—to allow two male squirrel monkeys called Sam and Dalton to see in full color for the first time.
Like some humans with red-green colour blindness, the monkeys lacked a pigment that the cones—the colour—detector cells at the back of the eye—need to see red and green. As a result, they saw both red and green
[填空题]Scientists believe that uranium was absorbed by the Earth when it was formed.
[单项选择]Some scientists believe that there is no evidence that cholestrol in food is directly linked to_____.
A. blood disease
B. heart disease
C. infectious disease
D. mental disorder
[单项选择]Some scientists believe that a breakthrough in the use of solar energy depends on _________.
A. advanced technology
B. further experiments
C. sufficient funding
D. well-equipped laboratories
[单项选择]Scientists and economists believe that human being can never use away all the mineral resources on Earth.（ ）
A. believe
B. can never
C. use away
D. mineral
[单项选择]Social scientists believe that societies with a_______ of young men without hope of marriage suffer from instability, violence and surges in crime.
A. swarmage
B. hatch
C. gang
D. surplus
[单项选择]Many scientists believe （ ） as a result of a collision between the newly formed Earth and a large asteroid.
A. that the Moon was formed
B. in that the Moon was formed
C. that the Moon formed was
D. when the Moon war formed
[单项选择]
Scientists believe that people "dressed up" long before they made a habit of wearing clothes. Primitive man dressed himself in feathers and ornaments, or painted his body and wrapped himself in animal skins. It was probably some time before man discovered that the decorations kept him warm and protected him from-various injuries. Even today, millions of people who wear little clothing use ornaments and decorations.
When primitive people began to wear clothing regularly, they had to make it from the materials at hand, In cold regions, they often used the skins of fur-bearing animals as protection against the cold. In warmer regions of the world, the people dressed themselves in clothing made from leaves, tree bark and woven grasses. Some people scraped the hair from animal skins to make soft leather for their clothes.
Linen was the first woven material from which clothes were made. From very early times, men have known how to make flax into fine linen. In
A. They wanted to be beautiful.
B. It was a custom at that time.
C. They discovered that "dressed up" could make them warm.
D. They wanted to make use of feathers and animal skins.
[单项选择]Medical scientists believe that______.
A. tests have been designed to settle the cholesterol dispute
B. drugs have been tested to reduce the amount of the substance in blood
C. low cholesterol foods or anti-cholesterol drugs or both can reduce the chance of a heart attack
D. none of the statements mentioned above is correct
[单项选择]Most scientists believe it is ______ to use animals in medical research.
A. legitimate
B. explicit
C. edible
D. illiterate
