单项选择题

交流二元二位继电器中的二元是指有两个互相独立又互相作用的交变电磁系统；二位是指继电器有吸起和落下两种状态。（）

A．对
B．错

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单项选择题

The use of computers in recording business events （）

A．has made the recording process more efficient
B．does not use the same principles as manual accounting systems
C．has greatly impacted the identification stage of the accounting process
D．is economical only for large businesses

不定项选择

‌碱式滴定管操作的基本步骤为：检漏、洗涤、润洗、装液、赶气泡、调液面和滴定。‍

A．正确
B．错误