两种病毒感染同一细胞时,一种病毒抑制另一种病毒增殖的现象称为____。
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We'll need __________ opinion.
A. expert
B. an expert
C. expertise
D. an expertise
He gave his son some money for the __________ of his school books.
A. purchased
B. purchase
C. purchasing
D. purchaser
如果注册会计师指派了不具有专业胜任能力的助理人员进行审计而导致未能发现应当发现的财务报表中存在的重大错报,并且导致发表了错误的审计意见,应该属于()。
A. 审计失败
B. 经营失败
C. 欺诈
D. 审计风险