职业道德是指从事某种职业的人员在工作或劳动过程中所应遵循的与其职业活动紧密联系的（）和原则的总和。
A. 工作纪律
B. 公共道德
C. 道德规范
D. 职业要求
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What bills are invalid？以下那些票据是有效的？（）
A. Pay to M Co. or order the sum of one thousand US dollars.”
B. Pay to M Co. providing the goods they supply are complied with contract the sum of one thousand US dollars.”
C. “Pay to M Co. out of the proceeds in our No. 1 account the sum of one thousand US dollars.”
D. “Pay to M Co or order the sum of one thousand US dollars and charge/debit same to applicant’s account maintained with you.”
E. “Pay to the order of ABC Co. the sum of one thousand US dollars plus interest
X62W型铣床进给传动系统中，接通慢速移动的是（）离合器。
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