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简述动态网页技术的主要组成部分？

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刻蚀工艺会影响光伏池片电学参数中的（）。

A. 开路电压
B. 并联电阻
C. 短路电流
D. 串联电阻

The charts sold are of （）.

A. newly edition with up to date correction and in reasonable prices
B. the current edition and incorporate the last Notices to Mariners correction
C. the current edition and incorporate the latest Notices to Mariners correction at the time of sale
D. brand-new one with up to date correction and clean writing

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The working cycle of a four-stroke diesel engine consists of four events:（） (1) compression (2) expansion (3) exhaust (4) suctionThe correct sequence is

A. (4)-(2)-(3)-(1)
B. (4)-(3)-(1)-(2)
C. (4)-(3)-(2)-(1)
D. (4)-(1)-(2)-(3)

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简述我国有机农业的发展历程。

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