题目内容：
当检查砌体砂浆饱满度时，用（ ）检查砖底面与砂浆的粘结痕迹面积，每处检测3块砖，取其平均值。
参考答案：
选择题：当检查砌体砂浆饱满度时，用（ ）检查砖底面与砂浆的粘结痕迹面积，每处检测3块砖，取其平均值。
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