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陕西自考网> 试题题库列表页> Task 221. In most cases of cloud-to-ground lightning, the ground's surface__________22. One form of lightning that is ball lightning. __________23. Cloud lightning looks like a ribbon when its lighting channel__________24. Although not fully understanding processes of lightning, man__________25. Lightening can__________A. occurs most infrequentlyB. is shifted sideways by strong windsC. strike twice or more in the same spotD. is equipped with a good knowledge of various forms of lightningE. is estimated at 20 million a yearF. is positively charged

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Task 2

21. In most cases of cloud-to-ground lightning, the ground's surface__________

22. One form of lightning that is ball lightning. __________

23. Cloud lightning looks like a ribbon when its lighting channel__________

24. Although not fully understanding processes of lightning, man__________

25. Lightening can__________

A. occurs most infrequently

B. is shifted sideways by strong winds

C. strike twice or more in the same spot

D. is equipped with a good knowledge of various forms of lightning

E. is estimated at 20 million a year

F. is positively charged


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