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【单选题】
机车牵引的列车在恒速区运行,按固定模式限速值+( )km/h确定为紧急固定模式限速值。
A.
2
B.
3
C.
5
D.
8
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A.
A dictionary told them.
B.
A person in love told them.
C.
Their parents told them.
D.
Their friends told them.
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A.
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A.
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【判断题】接地体制作完成后,在深0.8~1.0m的沟中将接地体垂直打入土壤中。
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【判断题】接地体制作完成后,在深0.8~1.0m的沟中将接地体垂直打入土壤中。
A.
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【单选题】用 250mL 容量瓶配制溶液,当液面凹位与刻度线相切时,其体积应记录为( )。
A.
250.000mL
B.
250.00mL
C.
250.0mL
D.
250mL
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