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[主观题]
The ability to store knowledge makes
computers different form every other machine _______ invented.
A) ever B) thus
C) yet D) as
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题目内容
（请给出正确答案）
computers different form every other machine _______ invented.
A) ever B) thus
C) yet D) as
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更多“The ability to store knowledge…”相关的问题
ferent form every other machine _______ invented.
A) ever B) thus
C) yet D) as
New "fake fat" products appeared on store shelves in the United States recently, but not everyone is happy about it. Makers of the products, which contain a compound called olestra, say food manufacturers can now eliminate. Critics, however, say the new compound can rob the body of essential vitamins and nutrients (营养物) and can also cause unpleasant side effects in some people. So it's up to consumers to decide whether the new fat-free products taste good enough to keep eating.
Chemists discovered olestra in the late 1960s, when they were searching for a fat that could be digested by infants more easily. Instead of finding the desired fat, the researchers created a fat that can't be digested at all.
Normally, special chemicals in the intestines(肠)"grab" molecules of regular fat and break them down so they can be used by the body. A molecule of regular fat is made up of three molecules of substances called fatting acids.
The fatty acids are absorbed by the intestines and bring with them the essential vitamins A, D, E and K. When fat molecules are present in the intestines with any of those vitamins, the vitamins attach to the molecules and are carried into the bloodstream.
Olestra, which is made from six to eight molecules of fatty acids, is too large for the intestines to absorb. It just slides through the intestines without being broke down. Manufacturers say it's the ability to slide unchanged through the intestines that makes olestra so valuable as a fat substitute. It provides consumers with the taste of regular at without any bad effects on the body. But critics say olestra can prevent vitamins A, D, E and K from being absorbed. It can also prevent the absorption of carotenoids(类胡萝卜素), compounds that may reduce the risk of cancer, heart disease, etc.
Manufacturers are adding vitamins A, D, E and K as well as carotenoids to their products now. even so, some nutritionists are still concerned that people might eat unlimited amounts of food made with the fat substitute without worrying about how many calories they are consuming.
We learn from the passage that olestra is a substance that______.
A．contains plenty of nutrients
B．renders foods calorie-free while retaining their vitamins
C．makes foods easily digestible
D．makes foods fat-free while keeping them delicious
Everyone dreams, but some persons never recall dreaming.Others remember only a little about a dream they had just before awakening and nothing about earlier dreams.No one recalls all his dreams.
Dreams involve little logical thought.ln most dreams, the dreamer cannot control what happens to him.The tory may be conf ing, and things happen that would not happen in real life.People see in most dreams, hut they may also hear, smell touch, and taste in their dreams.Most dreams occur in color.But people who have been blind since birth do not see at all in dreams.
Dreams are a product of the sleeper's mind.They include events and feelings that he has experienced.Most dreams are related to events of the day before the dream and strong wishes of the dreamer.Many minor incidents of the hours before sleep appear in dreams.Few events more than two days old turn up.Deep wishes or fears-especially those held since childhood-often appear in dreams, and many dreams fulfill such wishes.Events in the sleeper's surrounding-a loud noise, for example, may become part of a dream, but they do not cause dreams.
Some dreams involve deep feelings that a person may not realize he has.Psychiatrits often use material from a patient's dreams to help the person understand himself better.
Dreaming may help maintain good learning ability, memory, and emotional adjustment.People who get plenty of sleep but are awakened each time they begin to dream become anxious and restless.
21.This passage is mainly about().
A.why we dream during sleep
B.how we dream during sleep
C.what dreams are
D.what benefits dreams bring to people
22.According to the passage, dreams result from().
A.the sleeper's wishes
B.the sleeper's imagination
C.the sleeper's feeling
D.the sleeper's own mind
23.Which of the following is NOT true？ ()
A.Dream is a confusing story which involves little logic thought.
B.Dream is related to the dreamer's real life.
C.Dream is an imaginary store which seems real while taking place.
D.Dream involves events that always happen in real life.
24.This passage suggests that psychiatrists are().
A.trying to help the dreamer recall his earlier dreams
B.trying to make the sleeper dream logically
C.studying the benefits of dreams
D.helping the sleeper fulfill his dreams
25.We may infer form. the passage that dreaming().
A.is beneficial to people
B.disturbs people's life
C.makes people always restless
D.deprives people of a good sleep
A.STORE 12/27/98 TO RQ
B.STORE DTOC（ 12/27/98 ）TO RQ
C.STORE CTOD（12/27/98 ） TO RQ
D.STORE 12/27/98 TO RQ
有以下命令序列：
STORE 123.456 TO A
STORE STR(A+A,5)TO B
？ LEN(B) ,B
执行以上命令序列，最后一条命令显示的结果是______。
A) 3123 B) 3264 C) 5246 D) 5247
A.at
B.from
C.by
D.on
