室内木器用溶剂型腻子中甲苯+二甲苯+乙苯限量为≤30%。
参考答案：错
Steve, could you help me ___________ when the plane will take off on the Internet?
-I'm sorry, my computer doesn't work.[ ]
A. get on
B. find out
C. look for
D. look after
渠道的( )就是产品在从生产者流向最终顾客的整个过程中所经过的中间层次或环节。
A．长度
B．宽度
C．层次数目
D．多重性
