钢梁主桁腹杆铆接接头处裂纹长度大于等于()时,应及时处理。
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()objects are those which stand out clearly from the background or other objects and are easily identifiable from a few miles offshore in normal visibility.
A. Conspicuous
B. Permanent
C. Preliminary
D. Temporary
高压管道每一段5m长的管段()焊接口。
A. 允许有一个
B. 允许有两个
C. 允许有三个
D. 不允许有
通过下列句子分析儿化的作用。 (1)校长画了一幅画儿 (2)人活着就得做活儿 (3)他瞪大眼盯着那个眼儿 (4)他在信中给我投个信儿 (5)小孩儿长着苹果脸儿、骑着小马儿、拿着鲜花儿