多项选择题
口服避孕药的作用机制有哪些？（ ） A.
抑制排卵 B.
增加宫颈黏液的黏稠度，阻碍精子穿过 C.
改变子宫内膜的正常周期性 D.
改变宫腔内环境 E.
干扰孕卵着床
口服避孕药的作用机制有哪些？（ ） A.
抑制排卵 B.
增加宫颈黏液的黏稠度，阻碍精子穿过 C.
改变子宫内膜的正常周期性 D.
改变宫腔内环境 E.
干扰孕卵着床
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单项选择题
Which of the following requires the company's CEO and CFO to assume responsibility for the company's financial statements and disclosures? （ ）
Which of the following requires the company's CEO and CFO to assume responsibility for the company's financial statements and disclosures? （ ）
A．Sarbanes-Oxley Act of 2002 (SOX)
B．Institute of Management Accountants (IMA)
C．Enterprise Resource Planning (ERP)
D．Lean operations