厂区输油管道一般采用架空敷设，并尽可能与煤气管道或其他管道共架敷设。( )
参考答案：错
四季灯谜猜猜猜。
A. It's cold. I put on my hat, scarf, mittens and boots.
B. It is warm. I take off my winter clothes.
C. The weather is hot. I put on my shorts and T-shirt.
D. It is cool and windy. I put on my pants and sweater.
人工砂的总压碎指标值应（）。
A.＜16%
B.＜20%
C.＜25%
D.＜30%
