台秤空载时，（）不起摆原因之一是系统阻滞过少。
A.承重台板
B.承重机架
C.计量杠杆
D.台秤立柱
参考答案：C
Not until he called the secretary three times _________ that the manager went to an important meeting.
A．did he tell
B．he told
C．was he told
D．he was told
交通银行531工程人民币单位银行结算账户管理办法中单位存款人是指在交行开立银行结算账户的机关、团体、部队、其他组织、自然人和（）。
A.企业
B.事业单位
C.境外机构
D.个体工商户
