[判断题]所谓半导体，就是它的导电能力介于导体和绝缘体之间。-我要搜题网

The second-largest volcanic eruption of the 20th century, and by far the largest eruption to affect a densely populated area, occurred at Mount Pinatubo in the Philippines on June 15, 1991. The eruption produced high-speed massive falling of hot ash and gas, giant mudflows, and a cloud of volcanic ash hundreds of miles across. The impacts of the eruption continue to this day. A huge cloud of volcanic ash and gas rose above Mount Pinatubo, Philippines, on June 12, 1991. Three days later, the volcano exploded in the second-largest volcanic eruption on Earth in this century. Timely forecasts of this eruption by scientists from the Philippine Institute of Volcanology and Seismology and the US Geological Survey enabled people living near the volcano to evacuate to safer distances, saving at least 5 000 lives. On July 16, 1990, a magnitude 7.8 earthquake (comparable in size to the great 1906 San Francisco, California, earthquake) struck about 60 miles (100 kilometers) northeast o

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[单选题](133420)正常生产过程中粉料出料系统的输送介质是( )。(1.0分)
A.压缩尾气
B.低压氮气
C.高压氮气
D.压缩空气

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[判断题] ( )过剩空气系数是加热炉的一个重要指标,它可以根据烟道气体分析数据中的二氧化碳和氧的体积分数来计算。
A.正确
B.错误

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[单项选择]肱骨上端骨囊肿比较适合的治疗是（）
A. 囊内切除
B. 边缘性切除
C. 广泛性切除
D. 根治性切除
E. 根治性截肢

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[单项选择]因税务机关计算错误致使纳税人少缴税款的，税务机关在法定期限内可以要求纳税人补缴税款。该法定期限为______。
A. 6个月
B. 1年
C. 3年
D. 5年

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[填空题]
Directions: For each numbered blank in the following passage, fill in a suitable word in each blank on the ANSWER SHEET.

In the United States and in many (51) countries around the world, there are four main ways for people to be informed (52) developments in the news: Newspapers, magazines, and (53) or television news broadcasts. A person may use one, or all, of these (54) for information. Each source is useful in its own way. Newspapers and magazines can give much (55) about a particular event. They may provide some history of the event, some of its causes, some of its effects, or perhaps give an opinion or point of view on a particular development. Radio and television can help a person to be well-informed about what is (56) each day. It is also possible to listen to the radio or (57) TV and do something (58) at the same time. Many people can listen to the news (59)

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[不定项选择题]电话记录号由五位数字组成，前两位为（），后三位为()
A.车辆段/停车场及车站编号
B.序列号
C.车次号
D.目的码

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[填空题]搭设组装平台的总要求是，组装平台要，组装后道岔不侵入限界。

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[多选题]铁道车辆按用途一般分为（）。
A.客车
B.货车
C.特种用途车
D.发电车

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[多项选择]关于肾综合征出血热移行期下列提法正确的是（）
A. 移行期是指24小时尿量由500ml增至2000ml
B. 此期尿量虽增加，但血尿素氮和肌酐可继续上升
C. 此期仍易发生各种并发症
D. 此期的治疗原则同少尿期
E. 此期病人症状仍重，需密切观察

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[单选题]当齿轮的接触斑点位置正确，而接触面积太小时，是由于( )所致。
A.侧隙太大
B.中心距偏大
C.中心距偏小
D.茵形误差太大

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[判断题]携带型接地线宜存放在专用架上，架上的号码与接地线的号码可以不一致。（）
A.正确
B.错误