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 tru
A. no
B. per
C. each
D. every
更多"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。
"的相关试题:
[单项选择] 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 tru
A. for
B. since
C. in
D. at
[单项选择] 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。
|
Unpopular Subjects
Is
there a place in today’s society for the study of useless subjects in our
universities Just over 100 years ago Fitzgerald argued in a well-written letter
to Nature that "universities must be allowed to study useless subjects-if{{U}}
(51) {{/U}}don’t, who will " He went on to use the example of
Maxwell’s electrodynamics(电动力学) as one case where a "useless subject" has been
transformed (转换) to a {{U}} (52) {{/U}} subject.
Nowadays
this argument is again very active in many {{U}} (53) {{/U}} Indeed one
suspects that it is one of those arguments that must be fought anew (重新) by each
generation. But now there is an {{U}} (54) {{/U}} twist (歪曲，扭曲) -subjects
must not only be useful, they {{U}} (55) {{/U}} also be popular enough
that
A. under threat
B. on high demand
C. in progress
D. at work
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