布的种类也十分多样,不可尽数,根据其制作原料可分为纤维布,如棉、麻、羊毛、蚕丝纤维;合成纤维,如腈纶、涤纶、尼龙等。
查看答案
以石材为载体的装饰图案更易保存长久,因此它更适用于尺度巨大,具有纪念意义的装饰作品,装饰于严肃、正式、公共的场所与空间中。
A. 对
B. 错
“Stand by an engine” means
A. “prepare to stop the engine”
B. “assemble an engine on its bedplate”
C. “make an engine ready for starting”
D. “make an engine run steadily”
The purpose of engine stand-by is that __________.
A. the main engine in the stand-by condition
B. auxiliary machinery in the stand-by condition
C. dynamical equipment in the stand-by condition could be used immediately
D. A and B
We should not start the engine unless turning gear is __________.
A. on
B. disengaged
C. bolted
D. unscrewed
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