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【单选题】
The digital revolution in consumer electronics, including personal computer gadgets, began to gain momentum in 1998, and is expected to take a stronger hold of the market this year (1999). In 1998 the consumer electronics industry set the groundwork for the switch to digital products from analogue products, as companies formed alliances and introduced new products in the personal computer gadget, digital camera and digital television arenas. Digital technology produces sharper, higher-resolution images and crisper sound. Personal computer-type gadgets are perhaps most reflective of the oncoming digital age, and 3 Com Corp’s Palm Pilot is everyone's favorite example. It offers calendar and address book functions and the latest version will allow access to the Internet and real-time data such as stock quotes. As PC gadgets become hot items, home networking will grow, and may eventually reach a level in which everything in the home is computerized. In the near-term, however, networks that enable users to connect multiple PCs to printers and other PC gadgets in the home will grow, especially as users get broadband Internet access, analysts said. Other digital products that have received attention recently include CD-writeable products, which allow consumers to record on compact discs, and minidisk players. Diamond Multimedia Systems Inc. has elicited an uproar from record studios with its device that allows music to be downloaded from the Internet. 'We will see more varieties of products and different storage capacities coming to market-provided Diamond survives the litigation process here,' said Kevin Hause, an analyst at International Data Corp. 'It's going to be an interesting race to watch.' On the video end there is DVD, which is entering the home entertainment realm. However, Paine Webber said in its 1999 technology forecast that DVD will not make major progress in the market against CD-ROMs due to continued vendor wrangling over standardization. Still, the products are attracting users. In the first 18 months of sales, 365,000 people started using CDs, 394,000 VCRs and 1.07 million DVDs, said Jeff Joseph of the Consumer Electronics Manufacturing Association (Cema). Digital Video Disk Recorders are expected to be the next hot video item, as consumers become attracted to their real-time pause and personalized viewing abilities. And then there was this past autumn's high-definition TV launch. The year 1998 witnessed digital TV's first steps toward the mainstream, with manufacturers and networks putting forth high-definition television (HDTV). In November, digital signals were transmitted in major US markets and stores began carrying high-priced HDTV sets for curious consumers. Although some in the industry are pegging the advent of digital TV to be as momentous as the introduction of color TV, many industry analysts expect it to be a long time for the now costly technology to have any impact on the mainstream consumer. Cema expects the industry to have sold about 150,000 HDTV sets by the end of 1999. However, other analysts are more conservative, saying it will take at least until 2(D2 or 2003 for all the issues involved to be set- fled and standardization to occur. Which of the following statements is TRUE according to the passage?
A.
The digital revolution began in U.S..
B.
Gadget products are welcomed by everyone.
C.
The digital gadgets are expected to take a stronger hold of the market this year.
D.
Only scientists are aware of the advantages of the digital products.
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【判断题】交感神经兴奋可使内脏和心血管活动加强;副交感神经兴奋可使内脏和心血管活动减弱。
A.
正确
B.
错误
【判断题】交感神经兴奋可使支气管平滑肌收缩, 副交感神经兴奋可使支气管平滑肌舒张。
A.
正确
B.
错误
【判断题】交感神经兴奋可使内脏和心血管活动加强;副交感神经兴奋可使内脏和心血管活动减弱。( ).
A.
正确
B.
错误
【简答题】用镍铬-镍硅热电偶测量某低温箱温度,把热电偶直接 与电位差计相连接。在某时 刻,从电位差计测得 热电动势为-1.19mv,此时电位差计所处的环境温度为20°C, 试求该时刻温箱的温度是多少度?
【多选题】下列都是我国已被列入《世界遗产名录》的风景名胜,其中属于文化与自然双重遗产的是( )。
A.
泰山
B.
黄山
C.
武夷山
D.
秦始皇兵马俑
【多选题】采用铝箔离心玻璃棉纤维板为保温材料的矩形风管及设备保温钉应均匀,其数量底面不应少于每 m 2 ( )个,侧面不应少于( )个。顶面不应少于( )个,首行保温钉距风管或保温材料边沿的距离应小于 120mm 。
A.
16
B.
12
C.
10
D.
8
【多选题】下列都是我国已被列入《世界遗产名录》的风景名胜,其中属于文化与自然双重文化遗产I的是( )。
A.
泰山
B.
.黄山
C.
.武夷山
D.
秦始皇兵马俑
E.
.九寨沟
【单选题】( )是向幼儿进行教育的重要途径
A.
劳动
B.
体育课
C.
游戏
D.
教学活动
【简答题】交感神经兴奋 可 ___________ 消化活动,副交感神经兴奋 可 ___________ 消化活动。
【多选题】采用铝箔离心玻璃棉纤维板为保温材料的矩形风管及设备保温钉应均匀,其数量底面不应少于每m2( )个,侧面不应少于( )个。顶面不应少于( )个,首行保温钉距风管或保温材料边沿的距离应小于( )mm。
A.
16
B.
14
C.
12
D.
10
E.
8
F.
6
G.
100
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