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【判断题】
昆虫的中肠后端有许多盲管,其作用和高等脊椎动物的盲肠相同
A.
正确
B.
错误
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【单选题】In 1995 about 700,000 robots were operating in the industrialized world. Over 500.000 were used in Japan, about 120,000 in Western Europe, and about 12,000 in the United States. Many robot application...
A.
robots can be used in many fields
B.
what jobs robots can do
C.
robots' activities
D.
human being's partner—robots
【单选题】The maximum sea ice cover is about______.
A.
17,000 sq km
B.
170,000 sq km
C.
1,700,000 sq km
D.
17,000,000 sq km
【单选题】在短期内,随着产量的增加,平均固定成本会越变越小,于是平均成本曲线和平均可变成本曲线(    )。
A.
两曲线最终会相交    
B.
两曲线最终会合并成一条曲线
C.
两曲线的垂直距离会越来越小    
D.
两曲线的垂直距离会越来越大
【单选题】哮喘持续状态的吸氧浓度最佳为
A.
80%
B.
70%
C.
60%
D.
40%
【单选题】雾灯一般在什么天气情况下使用?( )
A.
晴天
B.
小雨天
C.
阴天
D.
有雾天气
【单选题】According to the article, which of the following is NOT true?
A.
In 1995 about 700,000 robots were operating in the industrialized world.
B.
Why people use the robots is that they are neither dangerous nor unpleasant.
C.
In medical laboratories, robots can be used to handle Potentially dangerous materials, such as blood or urine samples.
D.
In other cases, robots are used in repetitive, unchangeable tasks in which human performance might degrade over time.
【单选题】In 1995 about 700,000 robots were operating in the industrialized world. Over 500,000 were used in Japan, about 120,000 in Western Europe, and about 2,000 in the United States. Many robot applications...
A.
robots can be used in many fields
B.
what jobs robots can do
C.
robots' activities
D.
human being's partner—robots
【单选题】In 1995 about 700,000 robots were operating in the industrialized world. Over 500,000 were used in Japan, about 120,000 in Western Europe, and about 2,000 in the United States. Many robot applications...
A.
robots can be used in many fields
B.
what jobs robots can do
C.
robots' activities
D.
human being's partner --robots
【单选题】哮喘持续状态的吸氧浓度最佳为()
A.
80%
B.
70%
C.
60%
D.
50%
E.
40%
【判断题】在短期内,随着产量的增加,平均固定成本会越来越小,于是,平均成本曲线和平均可变成本曲线之间的垂直距离会越来越小,直至两线相交。(    )
A.
正确
B.
错误
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