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【单选题】
能说明 BF 3 分子的 4 个原子是同一平面的理由是 ( )A.
任意两个键之间夹角为 120°
B.
B—F 键为非极性共价键
C.
3 个 B—F 键的键能相同
D.
3 个 B—F 键的键长相等
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举一反三
【单选题】A patient with cholelithiasis screams in pain, "Why is this happening?" Which response by the nurse is correct?
A.
"I am going to get your pain medicine now. I can tell you about some of the risk factors for your illness when you are in less pain."
B.
"I can tell you all the reasons that people get cholelithiasis. Some of them include pregnancy and immobility."
C.
"No one knows what causes cholelithiasis. Just focus on getting better now."
D.
"Please stop screaming. You are scaring the other patients. I will go get your pain medicine now."
【简答题】Definiton: causing pain; full of pain English: Chinese:
【简答题】他为了这个项目付出了多年的辛勤劳动,做了深入的调查研究,制定了周密的计划,如果不是因为5月10日发生的那次意外事件让他分了心,这个项目成功的功劳就全是他的了。 (off course; take full credit for)
【单选题】施工单位对列入建设工程概算的安全作业环境及安全施工措施所需费用,不能用 ( )。
A.
安全防护用具的采购
B.
安全生产条件的改善
C.
安全施工措施的落实
D.
安全管理人员的加班补贴
【单选题】Why pleasant smells do not reduce pain in man is a question still _______ by scientists.
A.
answered
B.
being answered
C.
to be answered
D.
that answered
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