天然含水量<45%,饲料干物质中粗纤维含量<18%,粗蛋白质含量≥20%的饲料是()。
A. 粗饲料
B. 能量饲料
C. 青绿饲料
D. 蛋白质饲料
E. 饲料添加剂
ZD6型电动转辙机机体部分包括()等机件。
A. 底壳
B. 机盖
C. 堵孔板组
D. 线卡
You work with a database named DB1, which is located on a SQL Server 2005 computer. You discover that a table scan on Table1 in DB1 causes a slow query. Table1 is a very large table that is used frequently. You ascertain that the query contains the following statement. SELECT col1, col2 FROM table1 WHERE col3 = You need to provide maximum query performance. Table1 must remain available to users. What should you do?()
A. Update all statistics on Table1 in DB1.
B. Use the CREATE STATISTICS statement in DB1 to create missing statistics on col3of Table1.
C. Set the priority boost server option to 1.
D. Execute the following statement.USE DB1GOCREATE INDEX index1 ON table1(col3)INCLUDE(col1, col2) WITH (ONLINE = ON)GO
患儿男性,3岁玩耍后不停哭闹伴呕吐6小时,右腹股沟部有一小包块1年余,平时平卧后可缩小,此时平卧后包块不缩小且有触痛。体检:右侧阴囊肿胀,内可触及肿块,肿块呈蒂状延至腹股沟部。该患儿若采取手术治疗,术中的关键问题在于()
A. 鉴别是斜疝还是直疝
B. 搞清楚疝内容物是什么
C. 进行疝内容物回纳修补术
D. 判断疝内容物的生命力
E. 了解水、电解质紊乱、酸碱平衡失调情况