肝脏手术中为不致使肝脏丧失自动调节能力保护肝细胞功能,术中收缩压应维持()
A. 60mmHg以上
B. 70mmHg以上
C. 80mmHg以上
D. 50mmHg以上
E. 90mmHg以上
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实验室应有(),不论他们的其他责任,他们应具有所需的权力和资源来履行职责。
A. 管理人员、技术人员
B. 质量主管、技术主管
C. 实验室最高管理者和内审员
D. 授权签字人、设备管理人员
在加工表面和加工工具不变的情况下,所连续完成的那一部分工序内容,称为()。
A. 生成工艺过程
B. 工序
C. 工步
D. 生产过程
The sl:shoppingList and sl:item tags output a shopping list to the response and are used as follows: 11. 12. 13. 14. 15. The tag handler for sl:shoppingList is ShoppingListTag and the tag handler for sl:item is ItemSimpleTag.ShoppingListTag extends BodyTagSupport and ItemSimpleTag extends SimpleTagSupport.Which is true?()
A. ItemSimpleTag can find the enclosing instance of ShoppingListTag by calling getParent() and castingthe result to ShoppingListTag.
B. ShoppingListTag can find the child instances of ItemSimpleTag by calling super.getChildren() andcasting each to an ItemSimpleTag.
C. It is impossible for ItemSimpleTag and ShoppingListTag to find each other in a tag hierarchy becauseone is a Simple tag and the other is a Classic tag.
D. ShoppingListTag can find the child instances of ItemSimpleTag by calling getChildren() on thePageContext and casting each to an ItemSimpleTag.
E. ItemSimpleTag can find the enclosing instance of ShoppingListTag by calling findAncestorWithClass()on the PageContext and casting the result to ShoppingListTag.
渐开线直齿圆柱齿轮的啮合角和压力角各指什么角?他们有什么联系?