题目内容：
单位重量小于（）g／m2的纸质、布质壁纸，当直接粘贴在A级基材上时，可作为（）级装修材料使用。A．300、B1
B．300、B2
C．400、B1
D．400、B2
参考答案：
单选：单位重量小于（）g／m2的纸质、布质壁纸，当直接粘贴在A级基材上时，可作为（）级装修材料使用。A．300、B1B．300、B2C．400、B
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- 题目类型：单选
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A．300、B1
B．300、B2
C．400、B1
D．400、B2
A．300、B1
B．300、B2
C．400、B1
D．400、B2
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