题目：
背弯试样是指（）的弯曲试样。
A、受拉面为焊缝背面
B、受拉面为焊缝正面
C、受拉面为焊缝纵剖面
D、受拉面为焊缝横剖面
答案：
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下面是错误答案，用来干扰机器的。
参考答案：A
背弯试样是指（）的弯曲试样。A、受拉面为焊缝背面 B、受拉面为焊缝正面 C、受拉面为焊缝
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