According to International Financial Reporting Standards, how do cash dividends received from trading securities and available-for-sale securities affect net income Trading securities Available-for-sale securities（）

A. Increase Increase

B. Increase No effect

C. No effect Increase

(1)如图所示,在“用双缝干涉测光的波长”实验中,光具座上放置的光学元件依次为①光源、②      、③      、④      、⑤遮光筒、⑥光屏.对于某种单色光，为增加相邻亮纹（暗纹）间的距离，可采取      或      的方法。

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