下列对洋务运动理解不正确的是 [ ]
A、学习西方政治制度,维护清朝统治
B、创建海军,增强了海防力量
C、兴办民用工业,刺激资本主义发展
D、引进科学技术,培养了人才
答案:A
实验室配制一定物质的量浓度的溶液时,需用到容量瓶,容量瓶是一种颈部细长的梨形瓶,由于其颈部细长,所以在向容量瓶中转移液体时,需一定的耐心和技巧,有人建议将容量瓶的瓶颈改粗,对该建议的正确评价是( )
A.可以按此建议改进,便于使用容量瓶
B.不能按此建议改进,因为会降低容量瓶的精度
C.如果加粗瓶颈,可将原来刻在容量瓶瓶颈上的刻度改刻在容量瓶的瓶身上
D.不必加粗瓶颈,因为向容量瓶中转移液体时,少量液体倒出瓶外,不会对溶液的浓度产生影响
The nurse is providing preoperative care to a client scheduled for an appendectomy. Which statement regarding pain control is most appropriate ?()
A."There's no need to ask for pain medication, you'll receive it on a schedule. "
B."Take your pain medication after walking so that you won't feel dizzy. "
C."Take your pain medication before your pain becomes intense. "
D."Use as little pain medication as possible to avoid addiction. "