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【判断题】
雷电放电产生的雷电流会引起巨大的电磁效应、机械效应和热效应。A.
正确
B.
错误
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反馈参考答案：
举一反三
【单选题】What is a possible reason why some people are "hotheaded"?
A.
imagery
B.
techniques
C.
family background
【简答题】外毒素免疫原性强，其抗体称为【填空】。A. 抗毒素
【单选题】According to the writer of this passage, a possible reason for the disappearances is that __________.
A.
the sailors and airmen were taken away by people from space for scientific research
B.
Some navigational instruments ran out of order and therefore caused the ships sinking and the planes crashing
C.
the sailors and airmen could not stand the extreme weather conditions and they died natural death
D.
Some sailors and airmen were inexperienced and were responsible for the accidents
【单选题】What is the possible reason for the decrease of American's standard of living according to some studies?
A.
Because more and more married wowen work outside the home.
B.
Because many service jobs pay low wages.
C.
Because the rapid development of service economy.
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