皮皮学，免费搜题
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【单选题】
对于T频电流，人的感知电流约为0.5～1mA、摆脱电流约为5～10mA、室颤电流约为50mA。某事故现场如下图所示，电动机接地装置的接地电阻为2Q；该电动机漏电，流过其接地装置电流为5A；地面十分潮湿。如果电阻1000Q的人站在地面接触该电动机，可能发生最严重的情况是（ ）。A.
引起该人发生心室纤维性颤动
B.
使该人不能脱离带电体
C.
使该人有电击感觉
D.
使该人受到严重烧伤
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【简答题】测量力的大小的工具是 ___________,实验室常用测量力的大小的工具是________,它是依据______________________________________________________________的道理制成的。
【单选题】The sign shows that _____________.
A.
You should be careful on the ice.
B.
You can go this way to get out.
C.
You should pay attention to your steps.
【单选题】The sign shows that __________.
A.
you can leave your car here if you pay £50.
B.
you can not leave your car here.
C.
the parking fee is £50.
【单选题】After falling off a tall balcony, a patient is brought to the ER. The patient is alert, reports back pain, and has difficulty moving the lower extremities. Which additional sign shows that the patient...
A.
Cool, pale skin
B.
Bradycardia
C.
Poor skin turgor
D.
Increased systolic blood pressure
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