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【判断题】
误差的绝对值与观测值之比称为相对误差。()A.
正确
B.
错误
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反馈参考答案：
举一反三
【单选题】The plane was about to _______, and yet I left my ticket behind.
A.
take off
B.
take on
C.
take up
D.
take in
【简答题】肛管排气时，肛管插入直肠深度为
【简答题】交流二元 JRJCl-72 / 240 型继电器,其中局部线圈电阻值为 ____
【简答题】制剂配发必须有完整的记录或凭据。内容包括（）、（）、（）、（）、（）等。
【单选题】What did the pilot say to the passengers when the plane was about to make a forced landing?
A.
Brace for impact.
B.
Landing gear's ready.
C.
Keep calm and we are about to land.
D.
God bless us all.
【简答题】A．The plane was about an hour late. B．The plane was about half an hour late. C．The old man would not be late for his lecture. D．The management of the airport was inefficient.
【简答题】交流二元 JRJCl-72 / 240 型继电器,其中轨道线圈电阻值为 ____
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