题目内容：
A、120°，100°B、100°，120°
C、90°，120°
D、120°,90°
参考答案：
选择题：三角拉线塔拉线水平角间隔,四方拉线塔拉线水平角间隔。()
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[A]checking [B]gathering [C]holding [D]accommodating
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