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【单选题】
Caroline Man, a sixth-form. student at the South Island School, is becoming familiar with computers as early as possible. Not only does she have a personal computer at home, but her school has introduced the use of computers for several subjects. With about 100 PCs altogether, and nearly half available to students, South Island School is among the leaders in bringing computers into Hong Kong classrooms. But it is by no means the norm. Only 24 percent of secondary schools had more than 40 PCs, according to a recent survey of 10,000 teachers and students at 28 schools, commissioned by the Hong Kong Development and Strategic Research Centre (HKDSRC), a non-profit public policy group. Most of those were older models. Only 42.8 percent of respondents said they used Pentium-based PCs and 22.4 percent still used PCs with 386 processors. The Government has pledged to spend $2.5 billion to integrate computers into the school curriculum. The money needed to be spent wisely rather than be squandered an buying Computers, leading educators said. They pointed out that acquiring hardware was only the first step. Leo Yam, director of the Educational Technology and Development Centre at Lingnan College, said what he called 'soft technology' needed to be put in place first. Soft technology includes software, but also extends to training teachers and redesigning the curriculum to integrate computers. Mr. Yam said teachers had to learn not only how to operate computers, but also how PCs could help them teach. Teachers' attitudes also needed to be changed. Mr. Yam said teachers did not actually fear they would be replaced by a computer, but worried that if they did not adopt new technology, they would seem outdated to superiors and parents. Many teachers did not even use overhead projectors, in classes, Mr. Yam said. So even before worrying about the introduction of new technology, teachers have to ask if they have used the low-tech effectively first. Perhaps the most important channel for introduction of computers to the classroom is through curriculum design, by structuring courses to make the best use of computers. At South Island School, computers are used in 'design ease with computers' courses and there are several available for students to use at any time to type course work. South Island School also allows students to access the Internet on two PCs in the school library. What does 'it is by no means the norm' (Line 1, Para. 2) mean?
A.
It is really a typical school.
B.
It is certainly not typical.
C.
It sets up a standard for schools.
D.
It is not a progressive school.
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【单选题】A half-wave rectifier is connected to a AC source of 20 . The dc output voltage is ( ).
A.
19.3 Vdc
B.
13.65 Vdc
C.
6.14 Vdc
【判断题】Only the positive half-cycles of the source voltage appear across the load in the half-wave rectifier circuits.
A.
正确
B.
错误
【简答题】教材163页,教学互动7-2。 原本方案的总信用成本=_______万元; 经计算,新增收账费用的上限=_______万元。
【简答题】已知一个数列从0项开始的前3项:0,0,1,以后的各项都是其相邻的前3项之和。下列给定的程序中,函数fun()的功能是:计算并输出该数列前。项的平方根之和sum。n的值通过形参传入。例如,当n=10时,程序的输出结果应为23.197745。 请改正程序中的错误,使它能得出正确的结果。 注意:不要改动main函数,不得增行或删行,也不得更改程序的结构. 试题程序: include <conio.h>...
【单选题】槐花中含有( )晶体。
A.
靛蓝晶体
B.
草酸钙簇晶
C.
硫酸钙晶体
D.
芸香苷晶体
【判断题】The width of every wave zone in the half wave zone method is half wavelength. ( )
A.
正确
B.
错误
【单选题】槐花中含有( )晶体。
A.
靛蓝晶体
B.
草酸钙簇晶
C.
硫酸钙晶体
D.
芸香苷晶体
E.
钟乳体
【判断题】The reflected wave has the half wave loss when the wave propagates from a wave denser medium to a wave sparser medium. ( )
A.
正确
B.
错误
【简答题】给定函数:① ② ③ ④ ⑤ ⑥ 在上述函数中为偶函数但不是奇函数的是
【单选题】以下关于函数的说法错误的是:()
A.
系统函数只能是系统给定的,在程序中不能添加
B.
程序中的自定义函数只在程序中有效
C.
自定义函数能在整个站点共享使用
D.
以上答案都正确
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