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【单选题】
请根据短文的内容,回答题。 Computer Mouse The basic computer mouse is an amazingly clever invention with a relatively simple design that allows us to point at things on the computer and it is very productive. Think of all the things you can do with a mouse like selecting text for copying and pasting, drawing, and even scrolling on the page with the newer mice with the wheel. Most of us use the computer mouse daily without stopping to think how it works until it gets dirty and we have to learn how to clean it. We learn to point at things before we learn to speak, so the mouse is a very natural pointing device. Other computer pointing devices include light pens, graphics tablets and touch screens, but the mouse is still our workhorse. The computer mouse was invented in 1964 by Douglas Engle hart of Stanford University. As computer screens became more popular and arrow keys were used to move around a body of text, it became clear that a pointing device that allowed easier motion through the text and even selection of text would be very useful. The introduction of the mouse, with the Apple Lisa computer in 1983,really started the computer public on the road to relying on the mouse for routine computer tasks. How does the mouse work? We have to start at the bottom, so think upside down for now. It all starts with the mouse ball. As the mouse ball in the bottom of the mouse rolls over the mouse pad, it presses against and turns two shafts. The shafts are connected to wheels with several small holes in them. The wheels have a pair of small electronic light-emitting devices called light-emitting diodes (LED) mounted on either side. One LED sends a light beam to the LED on the other side. As the wheels spin and a hole rotates by, the light beam gets through to the LED on the other side. But a moment later the light beam is blocked until the next hole is in place. The LED detects a changing pattern of light, converts the pattern into an electronic signal, and sends the signal to the computer through wires in a cable that goes out of the mouse body. This cable is the tail that helps give the mouse its name. The computer interprets the signal to tell it where to position the cursor on the computer screen. So far we have only discussed the basic computer mouse that most of you probably have or have used. One problem with this design is that the mouse gets dirty as the ball rolls over the surface and picks up dirt. Eventually you have to clean your mouse. The newer optical mice avoid this problem by having no moving parts. Most computer users want to know how the computer mouse works. 查看材料
A.
Right
B.
Wrong
C.
Not mentioned
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【单选题】前言语阶段指的是 ( )
A.
0-1岁左右
B.
1-2岁左右
C.
2-3岁左右
D.
3-4岁左右
【判断题】儿童的前语言阶段是指0~1.5岁的阶段
A.
正确
B.
错误
【判断题】儿童的前语言阶段是指0~1.5岁的阶段
A.
正确
B.
错误
【多选题】( )属于电控发动机燃油喷射系统的组成部分。
A.
空气系统
B.
燃油系统
C.
控制系统
D.
空调系统
【判断题】前言语阶段是指婴儿说出第一个真正意义的词之前的时期,通常在0~12个月之间。
A.
正确
B.
错误
【单选题】婴儿指着爸爸的公文包说“爸爸”,这表明婴儿的语言发展处于()。
A.
前语言阶段
B.
单词句阶段
C.
电报句阶段
D.
言语掌握阶段
【单选题】下列不属于电控发动机燃油喷射系统组成部分的是( )。
A.
空气系统
B.
燃油系统
C.
控制系统
D.
空调系统
【简答题】BIOS中文是 意思,是固化在主板上的一块可读写的 芯片程序。
【单选题】儿童的“语言前阶段”是指()。
A.
从出生到六个月的“非自控阶段”
B.
六个月到一岁的“咿呀学语阶段”
C.
“非自控阶段”+“咿呀学语阶段”
D.
作为最初语言阶段的“单词阶段”
【单选题】前语言阶段是指
A.
从婴儿出生到产生第一个具有真正意义的词之前的时期
B.
咿呀学语阶段
C.
简单发音阶段
D.
婴儿模仿一些非语言的声音或成人发出的声音
E.
学话萌芽阶段
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