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【多选题】
温度对导体电阻的影响,主要有A.
温度升高，带电质点碰撞次数增加，阻碍作用加大
B.
温度升高，带电质点数目增多，容易导电
C.
温度升高，带电质点距离增大，容易导电
D.
温度升高，带电质点体积变大，阻碍导电
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举一反三
【单选题】Which of the following statements is NOT true?
A.
The results of economic decisions can not always be predicted.
B.
Minimum wage can not always protect employees.
C.
Economic theory can predict the results of economic decisions if other factors are not changing.
D.
Economic decisions should not be based on economic theory.
【单选题】稳压管稳压电路适合( )的电路。
A.
（ A）负载电流小，电压变化
B.
（ B）负载电流小，电压不变
C.
（ C）负载电流大，电压不变
D.
（ D）负载电流大，电压变化
【单选题】Which one is the common subject of economic news?
A.
A person who had economic problem.
B.
A corporation that planned an economic strategy.
【单选题】持久性有机污染物的特征
A.
持久性、迁移性、高毒性、脂溶性
B.
持久性、蓄积性、迁移性、高毒性
C.
持久性、蓄积性、脂溶性、高毒性
D.
迁移性、高毒性、脂溶性、蓄积性
E.
持久性、高毒性、脂溶性、蓄积性
【单选题】According to the proponents of economic growth, which of the following statements is true?
A.
Even though economy grows at the present rate, poverty still exists in the world.
B.
Economy must grow because poverty still exists.
C.
The present rate of economic growth is too slow.
D.
Economic growth may produce the money needed to get rid of poverty throughout the world
【单选题】Which of the following terms is defined in the passage?
A.
pheromones (line 2)
B.
colony integrity (lines 11-12)
C.
mass migrations (line 14)
D.
private messages (lines 18-19)
【单选题】根据《中华人民共和国海关稽查条例》的规定，海关可以在规定期限内，对被稽查人的与进出口活动有关的账簿、单证等资料实施稽查，不受任何单位和个人的干涉。( )
A.
正确
B.
错误
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