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问题 单项选择题

增大地表的土壤电阻率，就意味着增大了人脚与地面的接触电阻，从而减小通过人体的电流，进而达到减小跨步电压和接触电压的目的。最常用的加大地表土壤的（）的措施是在地表铺一层厚度为4～20cm的砾石或沥青混凝土。

A、电容率

B、电阻率

C、电感率

D、电抗率

答案

参考答案：B

单项选择题

A 4-year-old girl is admitted to the hospital to rule out leukemi

a. Which of the following would be the best room assignmentA. With a 4-year-old girl who has rheumatoid arthritis.B. With a 5-year-old boy who is having a tonsillectomy.C. With a 4-year-old girl who has leukemia.D. Alone in a private room.
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判断题

发生火情后要按照先报警，再救人，后救物的原则进行。
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