更多"Some countries are more populous; s"的相关试题:
[单项选择]Some countries are more populous; some have more crime. But in no other country are crime fighters quite so knowledgeable about citizens as in Britain. On January 4th a boastful Home Office detailed the triumphs of the world’s biggest forensic DNA database, which holds samples from more than 5% of the entire population of England and Wales. Recent changes to the rules governing the database mean that it may eventually hold profiles from more than a fifth of all adults.
Once a country starts storing DNA samples from criminals it is hard to resist the urge to expand the collection. When the National DNA Database (NDNAD) was set up, in 1995, samples could only be taken from those charged with "recordable" offences. If a suspect was not tried, or was freed, the sample had to be destroyed and the profile removed from the database.
That law was abandoned in 2001, after two men who had been convicted of murder and rape had their cases overturned on appeal--the DNA evidence against t
A. B．British citizens are quite knowledgeable about DN
[单项选择]Some people have a more complicated sensory life than others. Most taste tuna only when they eat it. A few, though, taste it when they hear a particular word, such as "castanet". Others link the color red with the letter "S" or make some other inappropriate connection between stimulus and response. Such people are known as synaesthetes, and the phenomenon of synaesthesia has puzzled brain scientists since it was recognized over a century ago.
Most researchers in the field suspect synaesthesia is caused by crossed wires in synaesthetes’ brains, but until recently they have had no way to check this hypothesis. However, the development of a technique called diffusion-tensor imaging has changed that. And researchers at the University of Amsterdam have just applied it to the brains of 18 women (the sex more likely to experience synaesthesia) who have the most common form of the condition. This is called grapheme-color synaesthesia. It is a tendency to see letters and numbers in color.<
[单项选择]—Mr. Johnson, would you have some more ice-cream
—No, thanks. It’s very good, but I have to（）my weight, you know.
A. remain
B. watch
C. notice
D. care
[单项选择]Some researchers have undertaken some psychological studies which prove that many children develop fears of（）dangers
A. imagination
B. imaginary
C. imaginable
D. imaginative
[单项选择]
M: Have some more sweets, please.
F: No, thanks. My teeth ... er ...
What does the woman mean（）
A. She wants to eat the sweets.
B. The sweets will be bad for her teeth.
C. She has had enough.
[单项选择]
Some people have malnutrition. Their diets have too much or too little of some nutrients ,or too many or too few calories. Nutritionists have three major ways of deciding if a person has malnutrition: physical exams, laboratory tests, and diet studies.
In the physical exam, the nutritionist looks for external signs of malnutrition. For one thing, the nutritionist looks at the patient’s skin. Rough, dry skin, for example, may mean that the patient does not have enough vitamin A. In addition, the nutritionist looks at the patient’s mouth. Cracks at the corner of the mouth, a purplish or bright red tongue, and bleeding gums can all be signs of vitamin deficiencies. The nutritionist also notices the patient’s hair. If a patient does not have enough protein, the hair may be thinner and duller than normal.
In laboratory tests, nutritionists look for the amounts of nutrients patients have in their bodies. There are two main types of laboratory tests: bl
A. A lot of vitamins are in the urine.
B. The body refuses to absorb vitamins.
C. Only a few vitamins passes through the body.
D. A lot of vitamins are taken in by the body.
