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【单选题】
Computers, and especially connecting to the Internet, provide unique opportunities to enhance science and math education. Take, for example, the project called Chickscope, a program that would only be possible with the Internet. Which came first, the chicken or the egg? In schools across the country, many teachers use the egg as a springboard to a demonstration of how life begins and develops, setting up an incubator to hatch chicks in the classroom. Fascinated kids watch as a chick pecks it way through the shell and finally struggles out. But what if the kids could see inside the egg and observe the changes in the chick embryo during its three weeks of growth, gathering egg-related data along the way? Chickscope, an interdisciplinary program based at the University of Illinois at Urbana-Champaign, permits just that. Kids see inside the egg courtesy of magnetic resonance imaging (MRI) technology. Without leaving their classrooms, East Central Illinois high school students and teachers can access and operate an MRI system via the World Wide Web, and watch as the chick embryo matures. 'They actually run the MRI system, collect data, and run experiments,' says Clint Potter, Chickscope project leader and a researcher at the university's Beckman Institute for Advanced Science and Technology. A key side benefit: Students not only learn about the subject at hand, they feel as though they are part of 'a community of learners,' as one teacher put it. This community concept is key to many of the prevailing theories about how best to learn science. Kids tend to learn faster and more deeply when the learning experience is shared. And that's what makes the Internet, with its built-in ability to promote interaction, so powerful. Students can use the Net as a tool to construct solutions to problems, learning from one another in the process by doing, not by rote instruction. And community learning can benefit the community. In an environmental science class at Covington High School in Covington, Louisiana, for example, students used the Internet to focus on cleaning up a local polluted stream by researching water-quality improvement techniques. With the help of a computer, they put together multimedia presentations for local and state political leaders. The Army Corps of Engineers awarded the city a grant to proceed with cleanup in large part because of the students' work, which the Corps said was the equivalent of $ 50,000 of research and preparation time. Because the Internet is not limited in time and space, it can transport kids to realms that are intrinsically more exciting than their own classrooms. Thousands of elementary school students connected by the Internet are joining biologist David Anderson in collecting satellite data that tracks the marathon flights of two species of albatross that nest on Tern Island in Hawaii. The Albatross Project, which is sponsored by the National Science Foundation, seeks to learn how the availability of food affects the large seabirds' extremely slow reproduction. But it has another purpose: sparking children's interest in science by involving them in actual research. The project seemed a perfect opportunity to engage school-age kids in science, says Anderson. According to the passage, which of the following should be encouraged to enhance the learning of math and science? Problem solving. Actual research. Repetitive in-class drills. Group work. Rote learning.
A.
1 and 3.
B.
1, 2 and 4.
C.
4 and 5.
D.
2, 3 and 5.
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【简答题】简述计算机的存储系统
【单选题】PCR反应时,使模板DNA变性的手段是( )
A.
NaOH
B.
高温
C.
强酸
D.
甲酰胺
【判断题】一个垄断厂商可以随心所欲的定价,以取得最大利润。
A.
正确
B.
错误
【单选题】在List、Set、Map中,哪几个接口从Collection接口继承,以下说法正确的是( )
A.
ArrayList 和 LinkedList 均实现了 List 接口
B.
ArrayList 访问速度比 LinkedList 快
C.
随机添加和删除元素时, ArrayList 的表现更加快速
D.
HashMap 实现了 Map 接口,它允许任何类型的键和值对象,并允许将 null 用作键或值
【单选题】1990年“阿里安”火箭爆炸是由于工作人员不慎将一块小小的擦拭布遗留在发动机供水管道里。你认为导致这次事故的根本原因是
A.
操作人员缺乏职业技能
B.
相关部门检查水平不高
C.
管理制度不健全
D.
从业人员没有严格遵守操作规程
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【简答题】作图: 请在供热课程设计用的建筑底图的基础上,进行各层供暖平面图的绘制,包括一层、标准层、顶层的供暖平面图。 上交时间:1班2班10月9日交,3班4班10月11日交 要求: 1、各层图中绘制出散热器,立管,立管编号,立管与散热器连接的分支管,总供水立管,总供水立管编号; 2、顶层平面还应绘制出:顶层供水干管,供水干管上的固定支架,若有分支供水干管应设阀门,供水干管与立管连接的分支管; 3、一层平面...
【判断题】一个垄断厂商可以随心所欲的定价,以取得最大利润
A.
正确
B.
错误
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