在ELISA中酶反应起了什么作用,使ELISA测定极为敏感,测定物的水平可从ng/ml至pg/ml()
A. 扩散作用
B. 放大作用
C. 缩小作用
D. 平衡作用
E. 催化作用
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所谓()监测是注水开发油藏,认识分层开采状况,提高油藏注水开发效果的重要基础。
A. 分层测井
B. 分层流量
C. 固定流量
D. 分层流压
技术分析法对证券市场的影响难以数量化、程式化,受投资者主观能力的制约较大。()
A. 正确
B. 错误
胶合板表面粘贴塑料贴面时,胶合板的含水率应保持在13%以下,板面含水率应均匀一致。
A. 正确
B. 错误
Which of the following choices correctly describes the difference between a data load via the conventional path and the direct path?()
A. One runs faster than the other
B. A conventional path data load bypasses most of the Oracle RDBMS, whereas a direct path load is a high-speed version of the SQL INSERT
C. A direct path data load bypasses most of the Oracle RDBMS, whereas a conventional path load is a high-speed version of the SQL INSERT
D. The conventional path runs when the CONVENTIONAL command-line parameter is set to TRUE