纬编(weft knitting)是将一根或几根纺线沿()逐步喂入织针上,然后顺序的弯曲成圈,并相互串套形成针织物的工艺方法。
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An AIX system, which is running a database, is having performance issues with I/O writing. The DBA has provided numbers for the HIGH and LOW watermarks for pending file writes, which will optimize the system for best performance. To set these numbers, which of the following commands would be used?()
A. perfmon -h 30 -l 25
B. chdev
C. no -o
D. smit chgsy
由E-R图导出关系数据模型时,如两实体间是1:n联系,应把一方实体的关键字纳入另一方实体的关系中,同时把联系的属性也一并纳入另一方的关系中。
A. 正确
B. 错误
检查汽缸有无裂纹时,汽缸上温度变化剧烈、断面尺寸突变、圆角过渡区、孔洞附近、槽口部位以及原制造厂补焊区等部位都属于主要检查部位。
A. 正确
B. 错误