John got beaten in the game, ______ had been expected.
A:as B:that C:what who
If it were only necessary to decide whether to teach elementary science to everyone on a mass basis or to find the gifted few and take them as far as they can go, our task would be fairly simple. The public school system, however, has no such choice, for the jobs must be carried on at the same time. Because we depend so heavily upon science and technology for our progress, we must produce specialists in many fields. Because we live in a democratic nation, whose citizens make the policies for the nation, large numbers of us must be educated to understand, to support, and when necessary, to judge the work of experts. The public school must educate both producers and users of scientific services.
In education, there should be a good balance among the branches of knowledge that con tribute to effective thinking and wise judgement. Such balance is defeated by too much emphasis on any one field. The question of balance involves not only the relation of the natural sciences, the social sciences, and the arts but also relative emphases among the natural sciences themselves.
Similarly, we must have a balance between current and classical knowledge. The attention of the public is continually drawn to new possibilities in scientific fields and the discovery of new knowledge; these should not be allowed to turn our attention away from the sound, established materials that form the basis of courses for beginners.
the word "defeated" (Line 2, ParA．2) most probably means （）
A:broken B:beaten C:destroyed D:damaged
He (is) proud (to have) never been (beaten) at (chess).
A:is B:to have C:beaten D:chess
We were all disappointed ______ the news that their team had been beaten.
A:in B:on C:for D:at
She heard a continual strange noise coming from the next room, her heart （）fast.
A:beat B:beats C:beating D:beaten
? ?下面的短文有15处空白，请根据短文内容为每处空白白确定1个最佳选项。
? ?It sounds all wrong-drilling holes in a
piece of wood to make it more resistant to knock. But it works because the
energy from the blow gets distributed throughout the wood rather than focusing
on one weak spot. The discovery should lead to more effective and lighter
packaging materials.
? ?Carpenters have known {{U}}?(51)
?{{/U}} centuries that some woods are tougher than others. Hickory(山核桃木), for
example, was turned into axe handles and cartwheel spokes (车轮辐条) because it can
absorb shocks without breaking. White oak (橡木), for example, is much more easily
damaged, {{U}}?(52) ?{{/U}} it is almost as dense. Julian Vincent at Bathe
University and his team were convinced the wood’s internal structure could
explain the differences.
? ?Many trees have tubular(管状的) vessels
that run {{U}}?(53) ?{{/U}}the trunk and carry water to the leaves. In oak
they are large, and arranged in narrow bands, but in hickory they are smaller,
and more evenly distributed. The researchers {{U}}?(54) ?{{/U}} this
layout might distribute a blow’s energy throughout the wood, soaking up a bigger
hit. To test the idea, they drilled holes 0.65 millimeters across into a block
of spruce(云杉), a wood with {{U}}?(55) ?{{/U}} vessels, and found that
{{U}}?(56) ?{{/U}}withstood a harder knock. {{U}}?(57) ?{{/U}} when
there were more than about 30 holes per square centimeter did the wood’s
performance drop off.
? ?A uniform substance doesn’t cope well with
knocks because only a small proportion of the material is actually {{U}}?(58)
?{{/U}}. All the energy from the blow goes towards breaking the material in
one or two places, but often the pieces left {{U}}?(59) ?{{/U}} are
pristine(未经破坏的).
? ?"But instead of the energy being concentrated
in one place, the holes provide many weak spots that all absorb energy as they
break", says Vincent, "You are controlling the places{{U}} ?(60) ?{{/U}}
the wood breaks, and it can then absorb more {{U}}?(61) ?{{/U}}, more
safely".
? ?The researchers believe the principle could be applied
to any material-{{U}} ?(62) ?{{/U}} example, to manufacture lighter and
more protective packaging. That could {{U}}?(63) ?{{/U}}be used in car
bumpers (保险杠), crash barriers and armor for military vehicles, says Ulrike
Wegst, {{U}}?(64) ?{{/U}}the Max Plank Institute for Mental Research in
Stuttgart. But she emphasizes that you’d{{U}} ?(65) ?{{/U}} to design the
substance with the direction of force in mind. "The direction of loading is
crucial", she says. |
A:effected B:beaten C:slapped D:affected
You should have {{U}}blended{{/U}} the butter with the sugar thoroughly.
A:spread． B:mixed C:beaten D:covered
You should have {{U}}blended {{/U}}the butter with the sugar thoroughly.
A:spread B:mixed C:beaten D:covered
单选题
