自粘聚合物改性沥青防水卷材按产品性能为I型和II型,卷材厚度为2.0mm的N类只有I型。
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某油罐高12米,底面直径14米,如果用其储存比重为0.77吨/立方米的蜡油能装多少吨?
ZPW-2000A型无绝缘移频自动闭塞系统,SPT型铁路信号数字电缆,直径为(),总长10km。
A. 1.0mm
B. 2.0mm
C. 3.0mm
D. 4.0mm
在胀管时如果达不到适宜的胀度值,胀接强度和严密性都很高,这种胀接称为"欠胀"。
A. 正确
B. 错误
You have included the following parameter setting in your server parameter file: PGA_AGGREGATE_TARGET = 800M SORT_AREA_SIZE = 100M HASH_AREA_SIZE = 100M BITMAP_MERGE_AREA_SIZE = 100M CREATE_BITMAP_AREA_SIZE = 100M Which statement is true?()
All the *_AREA_SIZE parameters are ignored.
B. The Automatic PGA Memory Management feature cannot be disabled.
C. The total Program Global Area (PGA) memory cannot be manually increased above 800
D. The total memory for the PGA can automatically exceed 800M using the Automatic PGA Memory Management feature.