单项选择题

A型斜视，上下注视是的斜视角相差_____ A. 10△ B. 15△ C. 20△

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多项选择题

What elements can you often find in a film noir? ( ) A. Night scenes. B. Diagonal composition. C. Rain. D. Suburban setting.

锡膏在焊盘上形成拉尖现象，形成的焊接缺陷为[填空(1)]

答案：拉尖