Karl Marx in his “scientific socialism” tries to tell us about____.

Through his own experience, the author tries to tell us something important in ________.

A．interpersonal relationship

B．off-campus education

C．career selection

D．self-discipline

The capital of this province tries to become a main manufacturing centre in the country.

What does the author tell us about Dr. Granich and his collegues and their trials?

A．They use data from some African countries and other poor countries.

B．They want to find out whether the alternative approach can function.

C．The first-line antiretroviral drugs are effective in curing patients.

D．Their study is to let the patients have no symptoms of AIDs.

In the passage, the author tries to tell us purely entertainment programs similar to the classic "Bewitched" ______.

A．are as good as those in the U. S.

B．have been seen on many government-controlled networks

C．are as gray and dismal as the uninformed might unnecessarily visualize

D．are not as gloomy as the uninformed might unnecessarily visualize

In the last paragraph, the author tries to tell us ______.

A．learning is closely related to memory

B．psychologists are interested in the brain

C．psychologist are more interested in behavior

D．the relationship between learning, brain and behavior

In the second paragraph the writer tries to tell us that ______.

B．the poor families often do not have enough food to eat

C．the hunger for the poor family is just short-term

D．not all the poor families encounter food-shortage

E．all the poor families do not have food to eat

Designing a lens can be compared to playing chess. In chess a player tries to trap his opponent's king in a series of moves. In creating a lens a lens designer attempts to "trap" light by forcing all the rays arising from a single point in the subject to focus on a single point in the image, as a consequence of their passing through a series of transparent(透明的) elements with precisely curved surfaces. Since in both cases the ultimate goal and the means by which it call be attained are known, one is tempted to think there will be a single best decision at any point along the way. The number of possible consequences flowing from any one decision is so large, however, as to be virtually, if not actually, infinite. Therefore in lens design, as in chess, perfect solutions to a problem arc beyond reach. Although this article will be concerned only with the design of photographic lenses, the same principles apply to all lenses.

The lens designer has one enormous advantage over the chess player: the designer is free to call on any available source of help to guide him through the staggering number of possibilities. Most of that help once came from mathematics and physics, but recently computer technology, information theory, chemistry, industrial engineering and psychophysics have all contributed to making the lens designer's job immeasurably more productive. Some of the lenses on the market today were inconceivable a decade ago. Others whose design is as much as a century out can now be mass-produced at low cost. With the development of automatic production methods, lenses are made by the millions, both out of glass and out of plastics. Today's lenses are better than the best lenses used by the great photographers of the past. Moreover, their price may lower, in spite of the fact that 19th-century craftsmen worked for only a few dollars a week and today's lenses are more complex. The lens designer cannot fail to be grateful for the science and technology that have made his work easier and his creations more widely available, but he is also humbled: it is no longer practical for a fine photographic lens to be designed from beginning to end by a single human mind.

Lens design and chess playing are similar in that______.

A．the final goal and the means by which it can be reached are known

B．perfect solutions to a problem can be found

C．any one decision at any point along the way to the goal can bring numerous possible results

D．both A and C

In the second paragraph, the author tries to tell us that.

  A．the author is a writer

  B．the author is busy

  C．VBA is time-consuming

  D．VBA is a program of many lines

The writer tries to tell us that______ .

A．life is meaningless without friends

B．life is possible without television

C．life is uninteresting without television

D．life is impossible without television

The writer of Advice 5 tries to tell the blogger______.

A．that he likes to use alarm clocks to wake up

B．that he himself has difficulty waking up early

C．to search the web for a lot of tricks, one of which is greatly recommended

D．to keep on finding the right answer