[简答题]Schools have become less important and long-term health care more important as America becomes a society with fewer children and more old people.

[简答题]Schools have become less important and long-term health care more important as America becomes a society with fewer children and more old people.

[填空题]Consumers have become less interested in 3D TV at home, partly because of (have)________ to wear special glasses.

[填空题]To make fears become a less serious problem for children, it is important to help them gain ______.

[判断题]Women have more fat cells so women have less water.

[单项选择]They usually have less money at the end of the month than （） at the beginning.
A. which is
B. which was
C. they do
D. it is

[单项选择]Why do people nowadays become less active（）
A. Because people are too lazy to do exercise.
B. Because people rely more on modem technology than on themselves.
C. Because people usually give up formal exercise.
D. Because people are too busy with their work and family.

[填空题]Before the rise of industry people have less ______ since they had to work from dawn to dark with little time allowed for meals.

[单项选择]As people age, their cells become less efficient and less able replace damaged components. At the same time their tissues stiffen, For example the lungs and the heart muscle expand less successfully, the blood vessels become increasingly rigid, and the ligaments and tendons tighten.
Few investigators would attribute such diverse effects to a single cause. Nevertheless, researchers have discovered that a process long known to discolor and toughen foods may also contribute to age-related impairment of both cells and tissues. That process is nonenzymatic glycosylation, whereby glucose becomes attached to proteins without the aid of enzymes. When enzymes attach glucose to proteins (enzymatic glycosylation), they do so at a specific site on a specific protein molecule for a specific purpose. In contrast, the nonenzymatic process adds glucose haphazardly to any of several sites along any available peptide chain within a protein molecule.
This nonenzymatic glyeosylation of certain p
A. It paradoxically both helps and hinders the longevity of proteins in the human body.
B. It can be counteracted in part by increased ingestion of glucose-free foods.
C. It is exacerbated by increased enzymatic glycosylation.
D. It probably involves the nonenzymatic glycosylation of proteins.

[单项选择]Guitar strings often go "dead"—become less responsive and bright in tone—after a few weeks of intense use. A researcher whose son is a classical guitarist hypothesized that dirt and oil, rather than changes in the material properties of the string, were responsible.
Which of the following investigations is most likely to yield significant information that would help to evaluate the researcher’s hypothesis
A. Determining if a metal alloy is used to make the strings used by classical guitarists.
B. Detennining whether classical guitarists make their strings go dead faster than do folk guitarists.
C. Detennining whether identical lengths of string, of the same gauge, go dead at different rates when strung on various brands of guitars.
D. Determining whether a dead string and a new string produce different qualities of sound.
E. (E) Determining whether smearing various substances on new guitar strings causes them to go dead.

[单项选择]A. The floods have been less and less these years.
B. The climate change does good to human beings.
C. The floods have been more widespread and more frequent.
D. The recent floods have nothing to do with the climate change.

[单项选择]Schools like hers are important to society because ______.
A. each of the children gets individual attention here every day
B. a lot of children can. have a chance to make good here
C. all the juvenile delinquents get punished here
D. children at the age of 16 can join the unit

[填空题]We become less ______ as the technology gets ever more sophisticated.

[单项选择]

International trade fairs have become extremely important venues for conducting business, yet very few domestically based sales organizations have an understanding of how to take advantage of the opportunities that these shows present. Unlike U.S. trade shows, at which there is an open display of one’s goods and services and a lot of looking but no buying, a European trade show is relatively closed and only open to those who are there to conduct business. The U.S. company often will spend a lot of money to set up an open display with charming sales people with little seniority or authority. The exhibit is saying, in effect, everyone and anyone is welcome but do not ask too many questions or expect to conduct any serious business. A comparable German exhibit will be more like a fortress where savvy gatekeepers will quickly weed out all but the most important clients who, once allowed into the inner sanctum, will meet directly with senior managers. The message that this exhib
A. put the quality of the product before any other factors
B. realize the importance of international trade fairs
C. employ professional and experienced sales people
D. take people’s different beliefs into account